Byron York: ... In one of my first conversations at the Radisson, with two Republican activists, I asked a simple what's-up question about Trump. Both immediately responded in exactly the same way: "I don't know anybody who supports him." They're politically active and aware, but they said they have no contact in their daily lives with even a single person who supports their party's front-runner. After that conversation, I began to ask everyone I met: Do you know anyone who supports Donald Trump? In more cases than not — actually, in nearly all the cases — the answer was no. I asked one woman Friday night, and she said she hadn't thought about it. I ran into her the next morning at breakfast, and she said, "That was a good question you asked me last night, and I've given it some thought." And no, she didn't know any Trump supporters. Given Trump's big lead in the polls, if so many politically active Republicans don't know e...