Cohen-Watnick is a former Defense Intelligence Agency official who was originally brought to the White House by Michael T. Flynn, the former national security adviser. The officials said that earlier this month, shortly after Mr. Trump wrote on Twitter about being wiretapped on the orders of President Barack Obama, Mr. Cohen-Watnick began reviewing highly classified reports detailing the intercepted communications of foreign officials.
Some further background on Cohen-Watnick from forward.com:
President Donald Trump reportedly overruled a decision by National Security Adviser Lt. Gen. H.R. McMaster in order to keep a Jewish National Security Council aide in his current position. Trump overruled the decision on Sunday after Cohen-Watnick, 30, appealed to White House advisers Stephen Bannon and Jared Kushner, Trump’s Jewish son-in-law, Politico reported