Disdaining Haley, Trump Says She ‘Probably’ Won’t Be His Running Mate

Former President Donald J. Trump intensified his attacks against Nikki Haley on Friday, saying that she was not of presidential caliber and that, as a result, he was unlikely to choose her as his running mate.

“She is not presidential timber,” Mr. Trump said at a campaign event in Concord, N.H. “Now, when I say that, that probably means that she’s not going to be chosen as the vice president.”

Mr. Trump, known for off-the-cuff pronouncements that veer from his prepared remarks, continued by making it clear that his dismissal of Ms. Haley was not a fluke: “When you say certain things, it sort of takes them out of play, right?”

Mr. Trump is well known for excoriating someone in one breath, and then reversing himself when it becomes politically or otherwise advantageous to do so. But his stance toward Ms. Haley, whom he appointed as his ambassador to the United Nations, has hardened as the New Hampshire primary approaches.

Though Mr. Trump holds a wide lead over Ms. Haley in polls, she has narrowed the gap here in recent months. The Trump campaign is eyeing a decisive win in New Hampshire that could severely curtail her chances at winning the Republican nomination.

On Friday, he again accused her of being supported primarily by Democrats, saying that “leftists” were spending millions on advertisements so they could “flood your airwaves with Nikki propaganda.”

He acknowledged that she had done a “fine” job during his presidency. But he continued to insist that he had appointed her only so that he could elevate South Carolina’s lieutenant governor to her seat.

“All you need to know about Nikki Haley is that every corrupt and sinister group we’ve been fighting for the past seven years is on her side,” Mr. Trump said.

Mr. Trump’s