Why would two major business groups be worried about Tennessee Sen. Bob Corker’s vote on a 2018 budget resolution that would lead to teeing up tax reform legislation? They were worried enough to stage a conference call with reporters on Tuesday to talk about the importance of Corker’s vote. Corker, a Republican, has announced he will not run for re-election in 2018. Corker spokesman Micah Johnson, in an email, indicated they had nothing to worry about. “Senator Corker voted for the budget resolution in committee, so unless there are substantial changes on the floor, he will support final passage,” Johnson said.