When Roosevelt died, the new president Harry Truman established a highly visible President's Committee on Civil Rights and ordered an end to discrimination in the military in 1948. Additionally, the Democratic National Convention in 1948 adopted a plank proposed by Northern liberals led by Hubert Humphrey calling for civil rights; 35 southerners walked out. The move was on to remove Truman's name from the ballot in the South. This required a new party, which the Southern defectors chose to name the States' Rights Democratic Party, with its own nominee: Governor of South Carolina J. Strom Thurmond. The Dixiecrats held their convention at Municipal Auditorium in Birmingham, Alabama,[7] where they nominated Thurmond for president and Fielding L. Wright, Governor of Mississippi, for vice president. They later adopted a platform in Oklahoma City that said:
We stand for the segregation of the races and the racial integrity of each race; the constitutional right to choose one's associates; to accept private employment without governmental interference, and to learn one's living in any lawful way. We oppose the elimination of segregation, the repeal of miscegenation statutes, the control of private employment by Federal bureaucrats called for by the misnamed civil rights program. We favor home-rule, local self-government and a minimum interference with individual rights.
The platform went on to say:
We call upon all Democrats and upon all other loyal Americans who are opposed to totalitarianism at home and abroad to unite with us in ignominiously defeating Harry S. Truman, Thomas E. Dewey and every other candidate for public office who would establish a Police Nation in the United States of America.The Dixiecrats did not expect to win the presidency outright; rather, they thought that if they could win enough Southern states then they would have a good chance of forcing the election into the House of Representatives, where they believed Southern bargaining power could determine the winner. To this end Dixiecrat leaders worked to have Thurmond-Wright declared the official Democratic ticket in Southern states. They succeeded in Alabama, Louisiana, Mississippi, and South Carolina. In other states, they were forced to run as a third-party ticket.
In Arkansas, Democratic gubernatorial nominee Sid McMath vigorously supported Truman in speeches across the state, much to the consternation of the sitting governor, Benjamin Travis Laney, an ardent Thurmond supporter. Laney later used McMath's pro-Truman stance against him in the 1950 gubernatorial election, but McMath won re-election handily.
Efforts by Dixiecrats to paint other Truman loyalists as turncoats generally failed, although the seeds of discontent were planted which in years to come took their toll on Southern moderates.
On election day 1948, the Thurmond-Wright ticket carried the previously solid Democratic states of Alabama, Louisiana, Mississippi, and South Carolina, receiving 1,169,021 popular votes and 39 electoral votes. Progressive Party nominee Henry A. Wallace drew off a nearly equal number of popular votes (1,157,172) from the Democrats' left wing, although he did not carry any states. The splits in the Democratic Party in the 1948 election had been expected to produce a victory by GOP nominee Dewey, but Truman defeated Dewey in an upset victory.
Southern strategyFrom Wikipedia, the free encyclopedia
For the British strategy in the American Revolutionary War, see Southern theater of the American Revolutionary War.

The Southern United States as defined by the United States Census Bureau
In American politics, the Southern strategy refers to the Republican Party strategy of winning elections or to gain political support in the Southern section of the country by appealing to racism against African Americans.
Though the "Solid South" had been a longtime Democratic Party stronghold due to the Democratic Party's defense of slavery prior to the American Civil War and segregation for a century thereafter, many white Southern Democrats stopped supporting the party following the civil rights plank of the Democratic campaign in 1948 (triggering the Dixiecrats), the African-American Civil Rights Movement, the passage of the Civil Rights Act of 1964 and Voting Rights Act of 1965, and desegregation.The strategy was first adopted under future Republican President Richard Nixon and Republican Senator Barry Goldwater in the late 1960s. The strategy was successful in some regards. It contributed to the electoral realignment of Southern states to the Republican Party, but at the expense of losing more than 90 percent of black voters to the Democratic Party. As the twentieth century came to a close, the Republican Party began trying to appeal again to black voters, though with little success.
In 2005, the head of the Republican National Committee, Ken Mehlman said at the NAACP convention, "Some Republicans gave up on winning the African-American vote, looking the other way or trying to benefit politically from racial polarization,". He also added. "I am here as Republican chairman to tell you we were wrong."