I’m skeptical that anti-Trump Republicans will coalesce
To answer your question, Julia, maybe anti-Trump Republicans will coalesce around a single alternative this time (perhaps because they have no choice — it’s possible that DeSantis will drop out after tonight and Haley will be the only Trump critic left). But even if they do, I don’t think it will matter, simply because there are very few anti-Trump Republicans left in the party. Over the past eight years, that breed of Republican has largely limped into retirement or lost in primary or general elections, and the new GOP establishment that replaced them has lined up behind Trump’s campaign. He has more endorsements at this point in the cycle than all but a handful of past candidates.
—Nathaniel Rakich, 538