"The toughest border security legislation in a generation is finally ready for a Senate vote, but Republicans are threatening to kill the bill they just spent months negotiating....The problem is that they’ve demagogued this issue (and so many others) for so long that they’ve effectively divorced electoral politics from policy. They have told so many lies—big and small—about immigration and immigrants that, faced in an election year with the chance to enact their policy proposals, all they can do is lie some more."