Which Candidates can deal with aliens

I'm talking space aliens, not the illegal kind. The ones with green skin, not the ones without greencards. Well, there was a poll of presidential candidates dealing with an alien invasion. Right now, Obama is slightly ahead, but McCain can be cool under fire and I think he would be able to keep his head in an invasion.

That said, some believe that UFO aliens are actually time travellers from the future. That would explain a lot of things.