What if someone you hated offered to pay off your mortgage or put your kids through college? You'd be suspicious at first, of course. Why is an enemy giving you the gift of a lifetime? But in the end, if you were smart, you'd take it. It would be too good to pass up. Something very much like that happened in Washington, D.C., recently. The Trump administration debated moving some of the thousands of migrants now massing through our southern border into various self-proclaimed sanctuary cities across the United States. Talk about great news for blue America. The left tells...