A couple days ago, Cain said he wants a deadly electrified fence on the border. After outrage at his remarks, he claimed he was joking. Now he says he isn't ruling out an electric fence but that he doesn't want anyone to be offended:

Kevin Drum expects the issue will be raised in tonight's debate:

First: What do you think Herman Cain will say about this? Second: with plenty of time to prepare, what do you think Rick Perry will say about it? Will he be able to string together 30 seconds worth of coherent thoughts on the issue? Or will he screw up completely as he usually does?