Here's a roundup of the late-night comics.
Conan O'Brien: John McCain says he has 20 names on a list of possible vice presidential candidates, yeah. Unfortunately, most of the names on the list are characters on "Matlock."
Jay Leno: Pennsylvania Senator Bob Casey Jr., who had said he would remain neutral cause he's a Democrat, has endorsed Barack Obama. He said he did it because his four young daughters told him they wanted Barack for president. Also explains his choice for vice president, Hannah Montana.
O'Brien: Barack Obama tried bowling, and his bowling score was a very low 37. Terrible score! Yeah, 37. Afterwards, Obama told reporters, that's it -- no more white guy sports for me.
Craig Ferguson: Earlier today, Hillary Clinton told a crowd in Pennsylvania that she can still win the Democratic nomination. Yep, that's right, it's April Fool's Day!
Leno: It was announced today that up to this point John McCain has not been using Secret Service protection. He's the only one, he's not using it. See, apparently he has Life Alert, so he uses that.
John McCain: Hi, Letterman. You think that stuff's pretty funny don't you? Well you look like a guy whose laptop would be seized by the authorities... You look like the guy who the neighbors later say, 'he mostly kept to himself.'"