Reason‘s Charles Paul Freund reveals that the last real segregationist racist in the White House was a Democrat. Namely, the much-admired (by the Left), Woodrow Wilson:
What Wilson’s election meant to the South was “home rule;” that is, license to pursue its racial practices without concern about interference from the federal government. That is exactly what the 1948 Dixiecrats wanted. But “home rule” was only the beginning. Upon taking power in Washington, Wilson and the many other Southerners he brought into his cabinet were disturbed at the way the federal government went about its own business. One legacy of post-Civil War Republican ascendancy was that Washington’s large black populace had access to federal jobs, and worked with whites in largely integrated circumstances. Wilson’s cabinet put an end to that, bringing Jim Crow to Washington.
I suppose Wilson’s low-minded racism was forgivable, since he was a high-minded multilateralist.