1972 was the year that the Radicals took over the Democrat Party. Since then they have moved the party even more left and driven out the conservatives and moderates to what we have now.
No Bill Clinton could not run and get the nomination now.
Jack Kennedy was much more Conservative and never was the Liberal he was purported to be, he definitely could not get the nomination.
In both cases the Democrat Party has left both men way behind and has moved to the Radical Left and there will be great violence in 2020 that will make 1968 look tame by comparison.
There is one person the Democrats could win with, and that’s Bloomberg, but the radicals won’t go for him.