This rant from Randi Rhodes uses lots of foul language, is really insulting, and isn't the least bit funny. I believe that qualifies it as "liberal humor."

Here's the biggest attention grabber from the video,

"Geraldine Ferraro turned out to be the David Duke in drag. Who knew? She's like, "Why am I the bad guy here? I just don't want anti-Semite racist in the white house." Like Nixon or Ronald Reagan or Dick Cheney, who moved to Wyoming so he would never have to see a black guy or a Jew ever and still run for Vice-President of the United States? It's unbelievable to me. What a whore Geraldine Ferraro is. She's such a f*cking whore....Hillary is a big f*cking whore, too." -- Air America radio host, Randi Rhodes

PS: Isn't it a little ironic that Hollywood is full of liberal script writers who can churn out hilarious material for sitcoms, but when the really political libs try to do humor, it's always these sort of moronic, rude insults. It's like when libs reach a certain point, their ideological beliefs get so poisonous that they can't even be funny any more.