Michael Moore to 'Late Night' host Seth Meyers on Thursday night: "I'm very worried about this. We all need to be very worried about this... We make jokes about this, but I think this is a dry run for the fall... I do believe that he’s now read the polls. He sees the data that he’s probably going to lose. He knows it. And so now he’s got to come up with something. And that something will be him trying to postpone the election."