WICHITA, Kan. — Sen. Roger Marshall, R-Kan., knows that he’s running for his political life, even in deep-red Kansas, where a Democrat hasn’t won since the Great Depression.It’s a Senate race that, until just a few months ago, was not on national Republicans’ radar. But Adam Hamilton, a well-known megachurch pastor styling himself as a moderate, has made the race uncomfortably close for Marshall and the GOP and pushed what was once a safe bet into toss-up territory.In an interview with Fox News Digital in Wichita, Kan., hours before President Donald Trump was set to rally behind the embattled...