Of those? Clinton vs. Trump. There's a decent (not huge, but still there) chance of Cruz vs. Clinton, though.
So you think the GOP establishment will get behind Trump or Cruz? Are Rubio, Bush and Kasich out of it? I would think this is far from over.
It's possible, I guess. It's just that:
-Rubio underperformed pretty severely after his gaffe, and he kind of needed to do well so 3-2-1 doesn't become 3-5-1.
-Kasich has been focusing in hard on NH, but he probably won't play well in the South, which sets him up for a very unfavorable map
-Bush is, for lack of a better word, a bad candidate. He's improving, but I don't think it'll be enough.