The South Carolina primary.

Haley looks set to lose her home state by a massive amount. Just so people are clear she's got absolutely no chance in this primary barring Trump's death. And even then I'm not so sure people wouldn't just vote for his corpse.

For those people thinking legal issues will trip him up ahead of the nominating convention, may I suggest looking at polls of Republicans on this. They don't care at all. They'd vote for him if he ate babies. It is a cult. His legal issues are only relevant to the general election.