“Hi, my name is Arlen Specter and I’ll be here all week. Tell your friends!”
Well not quite…but he DID do a real, laugh getting set at the Improv. Don’t believe it? JUST WATCH THIS:

Of course politicians of both parties do comedy all the time. It’s called “campaign promises.”
FOOTNOTE: It’s great to see a politico have fun (particularly someone his age) and be so well-received by an audience much younger than him. Expect some news articles and blog posts to express (trumped up) outrage that he dare make these jokes and appear in such an undignified place as a comedy club (as if Congress these days is dignified..)