Donald Trump’s final few days before the election are leaving Republicans “frustrated,” Barack Obama’s former senior adviser said Saturday. David Axelrod said on CNN that the former president is proving incapable of staying on message as he nears the vote, and it’s leaving his supporters worried. “A lot of Republicans are frustrated because Trump keeps getting off message and they would like him to be on the same message that his campaign is communicating on television in its advertising,” Axelrod said. Want more breaking political news? Click for the latest headlines at Raw Story. “… The vi…