They'd have to put him on tape delay to bleep out the naughty words
I think that Jefferson would be amazed at the way things have turned out. Remember, in his day, they left the only home they'd ever known to go to a new country that was barely habitable except in the few "urban" centers, and create an entirely new way of running a country. There were some monarchists in the new world, but the majority of the folks were into freedom and becoming something more than just another British colony (not that there's anything WRONG with that). The FF's had the backing of the populace.
Today, Jefferson would see a country with an unfathomable number of citizens, living in conditions that are downright Utopian for the most part, arguing the finer points of government and Constitutionality, arguing WITH the government without fear of reprisal (for the speech, anyway). I'd think he'd be beside himself. Plus, he'd think airplanes are cool.
Jesus, on the other hand, would probably need some Alka-Seltzer.