Trump adviser resigns after mocking Lewandowski on Twitter

“I regret sending out a tweet today alluding to the firing of Corey Lewandowski. In hindsight, that was too exuberant a reaction to this personnel move. I know this is a distraction from the kind of campaign you want to run, so I’m resigning my position as director of communications for caucus operations at the 2016 Republican Convention. Let’s make this immediate,” Caputo wrote in a letter to campaign chairman Paul Manafort and Rick Gates, according to a copy obtained by CNN.