Those Southern Democrats are all dead, Who.  Either they switched parties or left office.  There are no more Dixiecrats or Southern Democrats in US Congress.  Not one.  The Republican Party of anti-slavery existed for a few short years, before and after the Civil War.  That was 150 years ago.  In 1964, four out of five congrsssional Republicans voted for the Civil Rights Act.  Then came Lee Atwater with his Southern Strategy, which elected Reagan to office by appealing to Southern Racism, and that has been the implicit winning strategy of the GOP ever since, until, with Trump, it became an explicit strategy.  And you think African-Americans should vote Republican? That is an insult to the intelligence of our African-American voting citizens.