1870s to 1910s

By 1876, "Redeemer" Democrats had taken control of all state governments in the South. From then until the 1960s, state and local government in the South was almost entirely monopolized by Democrats. The Democrats elected all but a handful of U.S. Representatives and Senators, and Democratic presidential candidates regularly swept the region – from 1880 through 1944, winning a cumulative total of 182 of 187 states. The Democrats reinforced the loyalty of white voters by emphasizing the suffering of the South during the war at the hands of "Yankee invaders" under Republican leadership, and the noble service of their white forefathers in "the Lost Cause". This rhetoric was effective with many Southerners. However, this propaganda was totally ineffective in areas that had been loyal to the Union during the war, such as eastern Tennessee. Most of East Tennessee welcomed U.S. troops as liberators, and voted Republican even in the Solid South period.^[11]

The "Solid South" from 1880–1912.

Even after white Democrats regained control of state legislatures, some black candidates were elected to local offices and state legislatures in the South. Black U.S. Representatives were elected from the South as late as the 1890s, usually from overwhelmingly black areas. Also in the 1890s, the Populists developed a following in the South, among poor white people who resented the Democratic Party establishment. Populists formed alliances with Republicans (including black Republicans) and challenged the Democratic bosses, even defeating them in some cases.^[12]

To prevent such coalitions in the future and to end the violence associated with suppressing the black vote during elections, Southern Democrats acted to disfranchise both black people and poor white people. From 1890 to 1910, beginning with Mississippi, Southern states adopted new constitutions and other laws including various devices to restrict voter registration, disfranchising virtually all black and many poor white residents.^[13] These devices applied to all citizens; in practice they disfranchised most black citizens and also "would remove [from voter registration rolls] the less educated, less organized, more impoverished whites as well – and that would ensure one-party Democratic rules through most of the 20th century in the South".^[14][15] All the Southern states adopted provisions that restricted voter registration and suffrage, including new requirements for poll taxes, longer residency, and subjective literacy tests. Some also used the device of grandfather clauses, exempting voters who had a grandfather voting by a particular year (usually before the Civil War, when black people could not vote.)^[16]

White Democrats also opposed Republican economic policies such as the high tariff and the gold standard, both of which were seen as benefiting Northern industrial interests at the expense of the agrarian South in the 19th century. Nevertheless, holding all political power was at the heart of their resistance. From 1876 through 1944, the national Democratic party opposed any calls for civil rights for black people. In Congress Southern Democrats blocked such efforts whenever Republicans targeted the issue.^[17]

White Democrats passed "Jim Crow" laws which reinforced white supremacy through racial segregation.^[18] The Fourteenth Amendment provided for apportionment of representation in Congress to be reduced if a state disenfranchised part of its population. However, this clause was never applied to Southern states that disenfranchised black residents. No black candidate was elected to any office in the South for decades after the turn of the century; and they were also excluded from juries and other participation in civil life.^[13]

Electoral dominance

Democratic candidates won by large margins in a majority of Southern states in every presidential election from 1876 to 1948, except for 1928, when the Democratic candidate was Al Smith, a Catholic New Yorker; and even in that election, the divided South provided Smith with nearly three-fourths of his electoral votes. Scholar Richard Valelly credited Woodrow Wilson's 1912 election to the disfranchisement of black people in the South, and also noted far-reaching effects in Congress, where the Democratic South gained "about 25 extra seats in Congress for each decade between 1903 and 1953".^{[lower-alpha 1][13]}

In the Deep South (South Carolina, Georgia, Alabama, Mississippi, and Louisiana), Democratic dominance was overwhelming, with Democrats routinely receiving 80%–90% of the vote, and only a tiny number of Republicans holding state legislative seats or local offices. Mississippi and South Carolina were the most extreme cases – between 1900 and 1944, only in 1928, when the three subcoastal Mississippi counties of Pearl River, Stone and George went for Hoover, did the Democrats lose even one of these two states' counties in any presidential election.^[19] In the remaining states, the German-American Texas counties of Gillespie and Kendall, and a number of counties in Appalachian parts of Alabama and Georgia, would vote Republican in presidential elections through this period.^[20] In the Upper South (Tennessee, Kentucky, North Carolina, Arkansas, and Virginia), Republicans retained a significant presence mainly in these remote Appalachian and Ozark regions which supported the Union during the Civil War,^[20] even winning occasional governorships and often drawing over 40% in presidential votes.

1920s onwards

By the 1920s, as memories of the Civil War faded, the Solid South cracked slightly. For instance, a Republican was elected U.S. Representative from Texas in 1920, serving until 1932. The Republican national landslides in 1920 and 1928 had some effects. In the 1920 elections, Tennessee elected a Republican governor and five out of 10 Republican U.S. Representatives, and became the first former Confederate state to vote for a Republican candidate for U.S. President since Reconstruction. However, with the Democratic national landslide of 1932, the South again became solidly Democratic.

In the 1930s, black voters outside the South largely switched to the Democrats, and other groups with an interest in civil rights (notably Jews, Catholics, and academic intellectuals) became more powerful in the party. This led to the national Democrats adopting a civil rights plank in 1948. In response, a faction of Deep South Democrats ran their own segregationist "Dixiecrat" presidential ticket, which carried four states: South Carolina, Alabama, Mississippi, and Louisiana.^[21] Even before then, a number of conservative Southern Democrats felt chagrin at the national party's growing friendliness to organized labor during the Franklin D. Roosevelt administration, and began splitting their tickets as early as the 1930s.

Southern demography also began to change. From 1910 through 1970, about 6.5 million black Southerners moved to urban areas in other parts of the country in the Great Migration, and demographics began to change Southern states in other ways. Florida began to expand rapidly, with retirees and other migrants from other regions becoming a majority of the population. Many of these new residents brought their Republican voting habits with them, diluting traditional Southern hostility to the Republicans. The Republican Party began to make gains in the South, building on other cultural conflicts as well. By the mid-1960s, changes had come in many of the southern states. Former Dixiecrat Senator Strom Thurmond of South Carolina changed parties in 1964; Texas elected a Republican Senator in 1961; Florida and Arkansas elected Republican governors in 1966. In the Upper South, where Republicans had always been a small presence, Republicans gained a few seats in the House and Senate.

Throughout the 1970s and 1980s, the South was still overwhelmingly Democratic at the state level, with majorities in all state legislatures and most U.S. House delegations. Over the next thirty years, this gradually changed. Veteran Democratic officeholders retired or died, and older voters who were still rigidly Democratic also died off. There were also increasing numbers of migrants from other areas, especially in Florida, Texas, Virginia, Maryland, and North Carolina. As part of the Republican Revolution in the 1994 elections, Republicans captured a majority of the U.S. House's southern seats for the first time. As of 2021, they account for a majority of each Southern state's House delegation apart from Virginia, Maryland, and Delaware.

Following the 2016 elections, when Republicans won the Kentucky House of Representatives, every state legislative chamber in the South had a Republican majority for the first time ever.^[22] This would remain the case until Democrats regained both Houses of the Virginia Legislature in 2019.

Today, the South is considered a Republican stronghold at the state and federal levels. Some political experts identify a re-Southernization of politics and culture in the Clinton presidency coinciding with House and Senate leading positions held by southerners.

West Virginia

For West Virginia, "reconstruction, in a sense, began in 1861".^[23] Unlike the other border states, West Virginia did not send the majority of its soldiers to the Union.^[24] The prospect of those returning ex-Confederates prompted the Wheeling state government to implement laws that restricted their right of suffrage, practicing law and teaching, access to the legal system, and subjected them to "war trespass" lawsuits.^[25] The lifting of these restrictions in 1871 resulted in the election of John J. Jacob, a Democrat, to the governorship. It also led to the rejection of the war-time constitution by public vote and a new constitution written under the leadership of ex-Confederates such as Samuel Price, Allen T. Caperton and Charles James Faulkner. In 1876 the state Democratic ticket of eight candidates were all elected, seven of whom were Confederate veterans.^[26] For nearly a generation West Virginia was part of the Solid South.^[27][28]

However, Republicans returned to power in 1896, controlling the governorship for eight of the next nine terms, and electing 82 of 106 U.S. Representatives. In 1932, as the nation swung to the Democrats, West Virginia became solidly Democratic. It was perhaps the most reliably Democratic state in the nation between 1932 and 1996, being one of just two states (along with Minnesota) to vote for a Republican president as few as three times in that interval. Moreover, unlike Minnesota (or other nearly as reliably Democratic states like Massachusetts and Rhode Island), it usually had a unanimous (or nearly unanimous) congressional delegation and only elected two Republicans as governor (albeit for a combined 20 years between them). West Virginian voters shifted toward the Republican Party from 2000 onward, as the Democratic Party became more strongly identified with environmental policies anathema to the state's coal industry and with socially liberal policies, and it can now be called a solidly red state.^[29][30]

1965 to 2010

The 1990 general election marked the beginning of the end for commanding Democratic Party presence in the South (Democrats marked light blue, dark blue for seats gained)

In the 1968 election, Richard Nixon saw the cracks in the Solid South as an opportunity to tap into a group of voters who had historically been beyond the reach of the Republican Party. With the aid of Harry Dent and South Carolina Senator Strom Thurmond, who had switched to the Republican Party in 1964, Nixon ran his 1968 campaign on states' rights and "law and order". As a key component of this strategy, he selected as his running mate Maryland Governor Spiro Agnew.^[35] Liberal Northern Democrats accused Nixon of pandering to Southern whites, especially with regard to his "states' rights" and "law and order" positions, which were widely understood by black leaders to legitimize the status quo of Southern states' discrimination.^[36] This tactic was described in 2007 by David Greenberg in Slate as "dog-whistle politics".^[37] According to an article in The American Conservative, Nixon adviser and speechwriter Pat Buchanan disputed this characterization.^[38][39]

The independent candidacy of George Wallace, former Democratic governor of Alabama, partially negated Nixon's Southern Strategy.^[40] With a much more explicit attack on integration and black civil rights, Wallace won all but two of Goldwater's states (the exceptions being South Carolina and Arizona) as well as Arkansas and one of North Carolina's electoral votes. Nixon picked up Virginia, Tennessee, North Carolina, South Carolina, Florida, Oklahoma, Kentucky, Missouri, and Delaware. The Democrat, Hubert Humphrey, won Texas, heavily unionized West Virginia, and heavily urbanized Maryland. Writer Jeffrey Hart, who worked on the Nixon campaign as a speechwriter, said in 2006 that Nixon did not have a "Southern Strategy", but "Border State Strategy" as he said that the 1968 campaign ceded the Deep South to George Wallace. Hart suggested that the press called it a "Southern Strategy" as they are "very lazy".^[41]

The 1968 election had been the first election in which both the Upper South and Deep South bolted from the Democratic party simultaneously. The Upper South had backed Eisenhower in 1952 and 1956, as well as Nixon in 1960. The Deep South had backed Goldwater just four years prior. Despite the two regions of the South still backing different candidates, Wallace in the Deep South and Nixon in the Upper South, only Texas, Maryland, and West Virginia had held up against the majority Nixon-Wallace vote for Humphrey. By 1972, Nixon had swept the South altogether, Outer and Deep South alike, marking the first time in American history a Republican won every Southern state.

At the 1976 election, Jimmy Carter, a Southern governor, gave Democrats a short-lived comeback in the South, winning every state in the old Confederacy except for Virginia, which was narrowly lost. However, in his unsuccessful 1980 re-election bid, the only Southern states he won were his native state of Georgia, West Virginia, and Maryland. The year 1976 was the last year a Democratic presidential candidate won a majority of Southern electoral votes. The Republicans took all the region's electoral votes in the 1984 election and every state except West Virginia in 1988.

In the 1992 election and 1996, when the Democratic ticket consisted of two Southerners (Bill Clinton and Al Gore), the Democrats and Republicans split the region. In both elections, Clinton won Arkansas, Louisiana, Kentucky, Tennessee, West Virginia, Missouri, Maryland, and Delaware, while the Republican won Texas, Mississippi, Alabama, North Carolina, South Carolina, Virginia, and Oklahoma. Bill Clinton won Georgia in 1992, but lost it in 1996 to Bob Dole. Conversely, Clinton lost Florida in 1992 to George Bush, but won it in 1996.

In 2000, however, Gore received no electoral votes from the South, even from his home state of Tennessee, apart from heavily urbanized and uncontested Maryland and Delaware. The popular vote in Florida was extraordinarily close in awarding the state's electoral votes to George W. Bush. This pattern continued in the 2004 election; the Democratic ticket of John Kerry and John Edwards received no electoral votes from the South apart from Maryland and Delaware, even though Edwards was from North Carolina, and was born in South Carolina. However, in the 2008 election, as many areas in the South became more urbanized, liberal, and demographically diverse, Barack Obama won the former Republican strongholds of Virginia and North Carolina as well as Florida; Obama won Virginia and Florida again in 2012 and lost North Carolina by only 2.04 percent. In 2016, Hillary Clinton won only Virginia while narrowly losing Florida and North Carolina. In 2020, Joe Biden won Virginia, a growing stronghold for Democrats, and narrowly won Georgia, in large part due to the rapidly growing Atlanta metropolitan area, while narrowly losing Florida and North Carolina.

While the South was shifting from the Democrats to the Republicans, the Northeastern United States went the other way. The Northeastern United States is defined by the US Census Bureau as Pennsylvania, New Jersey, New York, and the New England States. Well into the 1980s, much of the Northeast – in particular the heavily suburbanized states of New Jersey and Connecticut, and the rural states of northern New England – were strongholds of the Republican Party. The Democratic Party made steady gains there, however, and from 1992 through 2012, all nine Northeastern states, from New Jersey to Maine, voted Democratic, with the exception of New Hampshire's plurality for George W. Bush in 2000.

2010 to present

Although Republicans gradually began doing better in presidential elections in the South starting in 1952, Republicans did not finish taking over Southern politics at the nonpresidential level until the elections of November 2010. As of 2023, the South is dominated by Republicans at both the state and presidential level, with Republicans controlling 21 of the 22 legislative bodies in the former Confederacy, the sole exception being the Virginia Senate. Between the defeats of Georgia Representative John Barrow, Arkansas Senator Mark Pryor and Louisiana Senator Mary Landrieu in 2014 and the election of Alabama Senator Doug Jones in 2017, there were no white Democratic members of Congress from the states that voted for George Wallace in 1968. Until November 2010, Democrats had a majority in the Alabama, North Carolina, Mississippi, Arkansas and Louisiana Legislatures, a majority in the Kentucky House of Representatives and Virginia Senate, a near majority of the Tennessee House of Representatives, and a majority of the U.S. House delegations from Arkansas, North Carolina, Mississippi, Tennessee, Virginia, and West Virginia, as well as near-even splits of the Georgia and Alabama U.S. House delegations.

The 2022 House elections (Democrats in blue and dark blue) showcased Republican political domination in the South, with most of the few Democratic districts in the South being demographically majority-minority

However, during the 2010 midterm elections, Republicans swept the South, successfully reelecting every Senate incumbent, electing freshmen Marco Rubio in Florida and Rand Paul in Kentucky, and defeating Democratic incumbent Blanche Lincoln in Arkansas for a seat now held by John Boozman. In the House, Republicans reelected every incumbent except for Joseph Cao of New Orleans, defeated several Democratic incumbents, and gained a number of Democratic-held open seats. They won the majority in the congressional delegations of every Southern state. Most Solid South states, with the exceptions of Arkansas, Kentucky, North Carolina, and West Virginia, also elected or reelected Republicans governors. Most significantly, Republicans took control of both houses of the Alabama and North Carolina State Legislatures for the first time since Reconstruction, with Mississippi and Louisiana flipping a year later during their off-year elections. Even in Arkansas, the GOP won three of six statewide down-ballot positions for which they had often not fielded candidates until recently; they also went from eight to 15 out of 35 seats in the state senate and from 28 to 45 out of 100 in the State House of Representatives.

In 2012, the Republicans finally took control of the Arkansas State Legislature and the North Carolina Governorship, leaving West Virginia as the last Solid South state with the Democrats still in control of the state legislature, as well as the governorship. In 2014, though, both houses of the West Virginia legislature were finally taken by the GOP, and most other legislative chambers in the South up for election that year saw increased GOP gains. Arkansas' governorship finally flipped GOP in 2014 when incumbent Mike Beebe was term-limited, as did every other statewide office not previously held by the Republicans. Many analysts believe the so-called "Southern Strategy" that has been employed by Republicans since the 1960s is now virtually complete, with Republicans in firm, almost total, control of political offices in the South. However, the Louisiana governorship was won by John Bel Edwards in 2015, and Jim Hood won a fourth term as Mississippi Attorney General the same year, making them the only Southern Democratic statewide executive officials. Hood retired in 2019 to mount an unsuccessful run for Governor of Mississippi, and was succeeded by Republican Lynn Fitch, while Edwards was reelected as Governor of Louisiana.

The biggest exception to this trend has been the state of Virginia. It got an earlier start in the trend towards the Republican Party than the rest of the region. It voted Republican for president in 13 of the 14 elections between 1952 and 2004, while no other Southern state did so more than nine times (that state, Florida, is the other potential exception to the trend, but to a significantly lesser extent). Moreover, it had a Republican Governor more often than not between 1970 and 2002, and Republicans held at least half the seats in the Virginia congressional delegation from 1968 to 1990 (although the Democrats had a narrow minority throughout the 1990s), while with single-term exceptions (Alabama from 1965 to 1967, Tennessee from 1973 to 1975, and South Carolina from 1981 to 1983) and the exception of Florida (which had its delegation turn majority Republican in 1989), Democrats held at least half the seats in the delegations of the rest of the Southern states until the Republican Revolution of 1994. However, thanks in large part to massive population growth in Northern Virginia and the orientation of that population with the political ideologies of the solidly Democratic Northeast, the Democratic Party has won most statewide races since 2005, and, in the 2020 presidential election, carried the state by a double digit margin for the first time since 1944.^[42]