Al Franken was much more than "just a liberal comedian."
Franken was the founding talent for the progressive Air America Radio Network, launched in 2003. Franken hosted "The O'Franken Factor," later renamed "The Al Franken Show" from March 2004 to February 2007.
This incident occurred while Franken was still the premier host on Air America Radio.
-PJ
And all three listeners thought he did a really good job; too!