They do keep trying:
Comedy Central took notes. "The one joke that worked":
"We're a full generation apart, Governor Romney and I. And, in some ways, we're a little different. There are the songs on his iPod, which I've heard on the campaign bus… and on many hotel elevators."
Previous coverage here. A reader's thoughts on the subject:
Conservatives can be funny and they have been in the past. The reason they aren't funny right now is because the Republican Party has gone off a cliff in relation to the truth. Good comedy, like other writing or art forms, is at its core exposing truth about someone or something. The GOP for at least the past decade has been increasingly about denial and lies. You can't be funny if you don't and can't see the truth.