As Donald Trump thanked the people of
 New Hampshire for his first of many electoral victories in February last year, the face hovering over his right shoulder was plastered with a broad smile, turning from side to side, seeming to soak up every second of the moment.

It must have been somewhat surreal for Donald McGahn. He was given a prominent position on stage that night as a reward for helping the campaign beat back an establishment challenge to Trump’s spot on the New Hampshire Republican primary ballot. A former Federal Elections Commission chairman, McGahn had been an early sign-on to the reality star’s upstart campaign.