House Republicans are probing whether the Department of Justice retaliated against one of their impeachment witnesses — a former business associate of Hunter Biden who revealed a 2014 conversation then-Vice President Biden had with his son and the former mayor of Moscow. Jason Galanis, who is currently serving a 14-year federal prison sentence for defrauding an American Indian tribe, disclosed a May 4, 2014, speaker phone conversation between Hunter and Joe Biden and Russian oligarch Yelena Baturina and her husband, the ex-Moscow Mayor Yuri Luzhkov. Galanis was interviewed last month from his prison cell in Montgomery, Ala., and during his...