Haley has a strategic decision to make about what stance to take with respect to Trump. But her campaign also needs to think, I argue in my new Washington Post column, about why Trump won in 2016 in the first place: How much of his success was based on his personality, and how much on his program? So far, Haley seems to be betting on pre-Trump substance with added combativeness:

Warming up the crowd in Charleston, S.C., before Nikki Haley formally announced her presidential run, Rep. Ralph Norman did something she didn’t: praise Donald Trump.
The former president, he said, had “reminded Americans of how to stand boldly for our beliefs,” and Haley too is “a bold leader who will fight for America.” . . .