All your tidbits of history have proven nothing. What does Truman using the A bomb and Hoover protesting its use, have to do with the discussion?
Did the Democratic and Republican parties change over the years regarding the ex-slaves? They made an almost complete exchange of beliefs regarding the role of black people in today's America.
They prove that the Democratic Party was and is the party of slavery, racism and segregation, and that the Republican Party was and is the party of freedom and liberty.
June 5, 1956 Republican federal judge Frank Johnson rules in favor of Rosa Parks in decision striking down “blacks in the back of the bus” law
October 19, 1956 On campaign trail, Vice President Richard Nixon vows: “American boys and girls shall sit, side by side, at any school – public or private – with no regard paid to the color of their skin. Segregation, discrimination, and prejudice have no place in America”
November 6, 1956 African-American civil rights leaders Martin Luther King and Ralph Abernathy vote for Republican Dwight Eisenhower for President
September 9, 1957 President Dwight Eisenhower signs Republican Party’s 1957 Civil Rights Act
September 24, 1957 Sparking criticism from Democrats such as Senators John Kennedy and Lyndon Johnson, President Dwight Eisenhower deploys the 82nd Airborne Division to Little Rock, AR to force Democrat Governor Orval Faubus to integrate public schools