South Carolina primary 2024: Trump projected to win, Haley vows to stay in the race

To Jacob's point, the "go ahead and underestimate me" phrase is a very clearly gendered one. And Trump's reputation on this issue hasn't gotten as much attention as it did in 2016, but it's not clear that some of the issues have gone away. Plus, Haley may also be highlighting the fact that, as far as she is from being a real contender for the nomination, this is the closest any GOP woman has come.

—Julia Azari, 538 contributor

People forget this, but McMaster was the first statewide elected official to endorse Trump back in 2016. Haley’s appointment to U.N. ambassador cleared the way for him to become governor, a post he still holds today.

—Nathaniel Rakich, 538

Nathaniel, I think that another explanation for Haley’s continued presence in the race is less political and more personal. Clearly, the two candidates don’t get along, and never really have. (Remember that the only reason Trump even tapped Haley as ambassador was as a favor to then-Lt. Gov. McMaster.) With the race getting increasingly chippy and personal, I think Haley may be staying in for longer than politically savvy because she knows just how much it gets under Trump’s skin. This is, after all, a politician who sells shirts that say "Go ahead and underestimate me, that’ll be fun."

—Jacob Rubashkin, Inside Elections

It was pretty clear Trump was going to be the nominee after New Hampshire. I think maybe Haley could be forgiven for trying to stay in for a couple more weeks to see if she could move the needle in South Carolina, a state she knows so well. But after it was clear that Trump’s polling lead wasn’t shrinking, she lost any practical justification for staying in the race.

—Nathaniel Rakich, 538