Senator Ron Johnson has been reelected, besting Democratic challenger Mandela Barnes, NBC News projects. Johnson leads Barnes 50.5 percent to 49.5 percent on Wednesday morning, with 100 percent reporting. Johnson came to the Senate on the coattails of the Tea Party movement, positioning himself as a classic fiscal hawk. But as with many fiscal conservatives, for Johnson, belt tightening seemed to boil down to “rules for me and not for thee.” Before being elected, Johnson evaded up to $3.5