As far as the GOP goes, the anti-Trump Republicans blew it, honestly. They should have united early, in favor of one candidate.
The anti-Trump Republicans were split between the moderates backing Kasich/Jeb etc. and the hardline movement conservatives backing Cruz. That's how Trump won: he happened upon a directionless, deeply split party and as an outsider was able to play the unifying candidate.
The only candidate who could have stopped Trump was Cruz, and like hell were the "establishment" going to throw their weight behind someone they hated even more.
Walker did the right thing by dropping out early (he was one of my favorites, but in terms of unity, it was right). The GOP candidates didn't do anything to attack Trump in his weak moments, and there were A LOT of weak moments.
