I don't know about those, but I believe from LBJ on there was a greater tolerance of protestors. And I don't remember freeways being shut down by motorcades until Slick was in, but I could be wrong.
I do know that once or twice in history, troops were actually called out to clear protesters or strikers, but I cannot remember who the Presidents were at the time... If I can find it, I will ping you, just for the fun of it.