In 2010, Paul Gosar was elected to represent Arizona’s 1st congressional district in the U.S. Congress. With the help of a much-publicized endorsement from Sarah Palin, he rode to victory on the wave of resentment against Washington that fueled what came to be called the tea-party movement. Given this background, I naturally paid attention when I ran across a YouTube video in which Gosar told a gathering of conservative activists, “If all you’re going to do is stand just for the Constitution and nothing less, you will lose. … Because not everybody believes in the Constitution.” (For a written report...