(REUTERS)  U.S. Republican Donald Trump overhauled his presidential campaign team on Wednesday for the second time in less than two months, hiring the head of a conservative news website to bolster his combative image and try to reverse poor opinion poll numbers. Trump named Steve Bannon, head of the Breitbart News website, as campaign chief executive officer, a new position. He also promoted senior adviser Kellyanne Conway to the post of campaign manager. The […]