[NTHockey]

Interesting that the biggest increases on both charts were 1964, when Democrats filibustered to prevent passage of The Voting Rights Bill.

[Ben Ficklin]

Voting rights were opposed by southern democrats and Midwestern republicans but supported by northern democrats and moderate republicans. In that vein Goldwater was the first to adopt a "southern strategy" and consequently won only AZ and a handful of southern states.

Also important was Eisenhower integrating the schools and sending the national guard to Little Rock. The little rock high school today is designated as a historical site and is a popular destination for black tourists.

Outsider Ross Perot did relatively well with blacks.

The last shift was the 2006 midterms when the GOP's campaign cost benefit analysis said that they should spend their money on motivating white voters.