After 1968, the Rats vowed to include the radical left rantings in their platform. Political correctness was born, IMHO.
And the first step in transferring Democrat political power from local and state level to national controls. "Getting rid of smoke filled back room deals" was the motto. Just need to look at all the carpetbagging Dem candidates running in states other than their own.
Kennedys and Clintons aside, the push was for control at all levels. I personally know of a NYC atty who moved to Florida on the promise that after 2 or 3 years was promised a Federal judgeship in the early 80s.