This shouldn’t even be a question. A great party is trying to produce its presidential nominee. Donald Trump is the leader in the contest so far, and looks likely to be the victor. But the cycle has just started (61 delegates allocated, 2,368 to go) and the party isn’t united, it’s split, roughly 50/50 pro-Trump and not. Nikki Haley is right to stay in and fight. No one has the right to shut her down. She’s stumping in her home state, South Carolina, and getting a lot of advice.