GOP leader McConnell returning to Senate after head injury

Read MoreSenate Republican leader Mitch McConnell will be back at work in the U.S. Capitol on Monday, almost six weeks after a fall at a Washington-area hotel and undergoing extended treatment for a concussionSenate Republican leader Mitch McConnell will be back at work in the U.S. Capitol on Monday, almost six weeks after a fall at a Washington-area hotel and undergoing extended treatment for a concussion