I don't think Nikki Haley has much room to demand much of anything at the moment. Trump is like 200 delegates away from winning the nomination outright.

I think she had more pull before Super Tuesday, but now she officially looks like the clown all rational people already knew she was.

Trump might offer her Secretary of Transportation or something just to get her to shut up and throw her support behind him, but I would be shocked if he offered her vice president.