With the state’s sizable Democratic majority galvanized by opposition to President Trump, Republicans have sought an issue that can motivate their conservative base and appeal to more-moderate voters. They believe they have found it in a statewide referendum to repeal a 12-cent-per-gallon increase in the gas tax that was enacted last year. National Republicans, including House Speaker Paul Ryan, Majority Leader Kevin McCarthy and Majority Whip Steve Scalise, contributed to the effort to gather enough signatures to put Proposition 6 on the ballot. Now, the party’s congressional candidates are making the repeal a focus of their campaigns, particularly in districts where races are tight and long drives are a way of life. Related Video Your browser does not support HTML5 video. 0:00 / 0:00 Skip Ad in 15 The WSJ’s Gerald F. Seib talks about the numbers that are important to determine control of the House and Senate. Photo: […]