I know the campaign is over but I am curious. Did Podesta really believe in UFO's or was that an inside joke?

Knowing very little about this boot-licker of the Clintons, except for what I remember of his covering up for Bill's administration and his under the desk antics, I would speculate that he absolutely believes in them and worships at the base of the Flying Spaghetti Monster's throne. But that's just me. He may have been joking.

I had a math teacher that worked on Project Blue Book for the USAF that believed in UFOs.
He said that all you had to do is to find a FO and U it.
It didn't even have to be an FO - it could just be an O that looked like it might be F'ing - and U it.

It is an ever growing Universe we are exploring. Anything is possible. I think it is short sighted of us to say that there are no UFO's.