Nikki Haley? Young, charismatic, a minority. She's said she wouldn't do it, but the cardinal rule of running for Vice President is to act like you're not running for VP.
And she's about to be indicted.
Doubtful. I don't like Haley, but so far despite a lot of mudslinging, none has stuck, and I don't have any reason to think it will start to stick. If anything, until there is some actual smoke to back up the allegations (and there hasn't been even that), these attacks are helping her politically, and she needs the help right now.