Chris LaCivita, one of Mr. Trump’s campaign managers, called Ms. Palmeri a “gossip columnist” in a post on social media on Oct. 31, the day the article about the campaign’s anxiety was published, and confirmed that her credentials had been denied. A spokesman for the Trump campaign did not immediately respond to a request for comment.

Journalists from several outlets said the Trump campaign denied them access to his election night watch party after 'critical' coverage of the ex-president.