Boris Alexandrovich Epshteyn (Russian: Бори́с Алекса́ндрович Эпштейн; born August 14, 1982) is a Russian-born American Republican political strategist, investment banker, and attorney. He is currently the Chief Political Analyst at Sinclair Broadcast Group. He was a senior advisor to Donald Trump's 2016 campaign for President of the United States, and previously worked on the McCain-Palin campaign. Following Trump's election, he was named director of communications for the Presidential Inaugural Committee, and then assistant communications director for surrogate operations in the administration, until he resigned in March 2017.
TL;DR: The guy in charge of political programming for Sinclair worked for Trump, both on the campaign and in the white house.