Today is primary Tuesday for the Republican Senate races in three key states: West Virginia, Ohio and Indiana. Each has a contested Republican primary and an incumbent Democrat defending his seat. They also all voted for Donald Trump in 2016 and are three of the 10 states where he won with Democratic incumbent senators. Trump won Ohio by 8 percent, Indiana by 19 percent and West Virginia by 42 percent. Yet, all three still have some drama about which party’s candidate will be the presumed frontrunner going into the November election. In Ohio, the marquee matchups are for the governor’s race with both parties having primaries. For the Senate seat, there is a six-candidate Republican primary for the chance to take on incumbent De...