On immigration, Republicans long ago sold their souls and humanity for political gain. But in the wake of the recent shooting death of a 31-year-old California woman by an undocumented Mexican worker in San Francisco, it's become obvious that Democrats are really no different. Sen. Dianne Feinstein (D-Calif.) and Democratic presidential frontrunner Hillary Clinton could have used the tragedy as a teachable moment about the insanity that is America's immigration system.