Rep. Adam Kinzinger has battled Trump and his fellow Republicans. In deep blue Illinois, could that be a strategy for higher office?

CHICAGO — When U.S. Rep. Adam Kinzinger of Illinois was asked recently what it means to be a Republican in the era of President Donald Trump, the fifth-term congressman chuckled, then turned serious. “I still hold that being a Republican in general means supporting national defense and smaller government. What does it mean today? I mean, in the state we’re in, I really don’t know,” Kinzinger said. “This is a moment in which what used to be in is out and what used to be out is in. Really, (what) the Republican movement seems to be at the moment — and I think it’s momentary — is just kind of ‘ow...