It looks like the smart money is on Delaware Senator Joe Biden for Obama's running mate. Mark Halperin's already announced it in his typical cryptic way (after erasing his "if I don't know the selection it hasn't happened yet" post from last night): "Bo knows," he says, which probably refers to Biden's son, Beau, though why Beau would know is unknown. Why would Obama choose Biden? Our theory is that Obama just likes Biden. He's a funny guy. But is it a terrible choice? We think it is! But we'd love to be wrong! Pros and cons (mostly cons), below. The official line is age, experience, and foreign policy expertise-Biden matches up well against McCain by outdoing him on most of his strengths besides the "tortured for five years by homos" thing. But with Biden comes the history of saying insane and inappropriate things and, you know, the plagiarism. (We said he matched up well with McCain!) And hey, let's look at some of our favorite moments of Biden saying something insane-taken entirely from his recent run for the presidency! July, 2006: