Predictions:
The Republican Party as we've known it is over. It'll stick around, but anyone who expects to win in its nominating contests is going to have to be openly racist, not covertly racist.
The Democratic Party as we've known it is also over, because there are two possibilities: Clinton wins in November, or Clinton loses in November. In the first case, she faces stiff opposition from more progressive members of Congress, one of whom challenges her in the 2020 primaries. Every Democratic presidential contest after that will be largely a repeat of this year's in terms of the policy differences between the candidates, at least until one camp wins a landslide victory over the other. In the second case, the accusations from Clinton's supporters that she lost because Sanders supporters didn't vote for her, and the accusations from Sanders supporters that Clinton lost because she's not a "real progressive" make it untenable for the two camps to remain in the same party.