No one invited them, and yet they keep coming. It's an invasion. They're not dangerous, but they are a nuisance. They take up the time of the U.S. Border Patrol, and get everyone worked up. They come for the work, but still you wish they would just stay home. We're talking, of course, about radio and television talk show hosts who descend on the U.S.-Mexican border in the hopes of spinning the anxiety of many Americans over illegal immigration into higher ratings. The latest spinner to arrive in these parts was conservative talker Sean Hannity who, just last week, descended...