Another one bites the dust. Trump campaign chairman Paul Manafort has resigned, the latest in a major reshuffle of the campaign. Manafort, who took over from Trump’s previous campaign manager Corey Lewandowski just two months ago, has recently come under scrutiny for his previous work for the Russian-backed ex-Ukrainian president. He’d previously been a driving force on campaigns for Gerald Ford, Ronald Reagan, George Bush Sr., and Bob Dole. Trump says Manafort’s left on amicable terms. As Trump’s campaign seeks stability amongst plunging polls, Manafort’s departure – and Trump’s recent apology for causing “personal pain” – signals a potential shift in tactics.