TEXT: FILE - In this Aug. 16, 2017, file photo, Sen. Bob Corker, R-Tenn., speaks to the Sevier County Chamber of Commerce in Sevierville, Tenn. Always one to speak his mind, Corker's new free agent status should make President Donald Trump and the GOP very nervous. The two-term Tennessee Republican isn't seeking re-election. And that gives him even more elbow room to say what he wants and vote how he pleases over the next 15 months as Trump and the party's top leaders on Capitol Hill struggle to get their agenda on track (AP Photo/Erik Schelzig, File)