In this 2007 appearance on the Late Show with David Letterman shortly after Franken announced his run for Senate, Letterman asks Franken point blank: "Can you be funny anymore, or can you not be funny anymore?" Franken responds by explaining that he's a satirist and Letterman is a clown. Touché.
The Full Ginsburg responds:
Jared Bloom: See, this is how you know that Al Franken is not a serious politician. He's doing an interview on a comedy show! If you want to be taken seriously, you have to go on a show that's not about getting laughs, like Meet the Press. Or The Tonight Show.
Eric Cunningham: Franken says the difference between what Letterman does and what he did was that Franken "makes people think". I think I missed the message in the Stuart Smalley movie then.