This April 30, 2014 file photo shows Sen. Bob Corker, R-Tenn. on Capitol Hill in Washington. Two senators proposed Wednesday to raise federal gasoline and diesel taxes for the first time in more than two decades as Congress struggles with how to pay for highway and transit programs. Sen. Chris Murphy, a Connecticut Democrat, and Corker, a Tennessee Republican, pitched their plan as a bipartisan solution to replenish the federal Highway Trust Fund. That fund is forecast to go broke in late August. (AP Photo, File)