What's going to happen tomorrow?

I think Obama will win Vermont and Texas (popular vote and delegate count), while Clinton will win Ohio and Rhode Island. I don't think Clinton will gain serious ground on Obama.

If she doesn't win the popular vote in Ohio and Texas, I do think Clinton should drop out. If she wins the popular vote in those states, I think it's reasonable for her to continue on to Pennsylvania, even though it would be very hard for her to overtake Obama in the delegate count.