Boris Epshteyn, Trump TV surrogate, leaving White House

But two people familiar with Mr. Epshteyn’s tenure said he had become combative with the networks on which he was assigned to book surrogates defending the administration, a junior position for someone who has other news media experience, which he does.

A recent report by Politico detailed a blowup that Mr. Epshteyn had with Fox News, the cable network that most consistently defends the president’s agenda.

Mr. Epshteyn, known for his argumentative, badgering style on TV, was a spokesman for the presidential inaugural committee. He grew up in Moscow, and met Eric Trump at Georgetown University.