The blowback prompted Mr. Trump, in the Fox News interview, to lament that the news media clobbers his press team “if they get it just a little wrong.” “It becomes a big story for two days or three days,” the president told Jeanine Pirro. There have also been many occasions when what was said at the lectern turned out to be flat-out untrue — a problem that drew intense scrutiny this week, when the administration’s account of how Mr. Trump came to fire Mr. Comey was undermined a day later by the president himself. “Just don’t have ’em,” the president said in an interview with Fox News, addressing the sharp criticism he and his press team received after this week’s chaotic rollout of the firing of the F. B.I.