president trump is beefing up his legal team adding a veteran washington lawyer to his defense amid the expanding russian investigation. now on board attorney john dowd who once led the investigation into the pete rose betting scandal for major league baseball. >> this as cnn learns that tensions are rising at the justice department over the russia probe and deputy attorney general rod rosenstein. he's under new scrutiny and now may be forced to recuse himself from overseeing the probe for his role in the firing of former fbi director james comey. >> for the first time friday in a statement via twitter the president acknowledged he's being investigated for comey's firing and blaming rosenstein, for what he calls a witch hunt. the question is will the deputy attorney general be the second top official at the justice department to recuse himself in the russian investigation. evan peres has more.