Author: JEREMY DIAMOND, CNN

Top Mulvaney aide refuses to testify in House inquiry

A top aide to White House chief of staff Mick Mulvaney, Robert Blair, has refused to testify in the House impeachment inquiry of President Donald Trump after the White House directed him not to appear for his scheduled deposition, his attorney told CNN.

House committees ask Mulvaney aide Rob Blair for testimony

The House committees conducting the impeachment inquiry into President Donald Trump are seeking testimony from Robert Blair, an assistant to the president and senior adviser to acting White House chief of staff Mick Mulvaney, a source familiar with the request told CNN.

White House staff rally around Mulvaney amid frustrations

Acting White House chief of staff Mick Mulvaney earned a show of support from his colleagues on Monday after facing days of withering criticism over his fraught attempts to walk back last week's stunning admission to a quid pro quo involving security aid to Ukraine.