PROVO, Utah -- Rep. Chris Cannon is a loyal Republican with the endorsement of the National Rifle Association and a 100 percent rating from the American Conservative Union. He is unmarred by the ethical scandals that have roiled Washington in this election season.... Tuesday's matchup in Utah is viewed as a bellwether for how immigration issues play out nationwide. "If you want to throw the bums out, you can do that," Mr. Cannon said during his debate with Mr. Jacob earlier this month. Responded Mr. Jacob: "When you talk about throwing the bums out, I'm just working on one right...