Chicago, Apr 19 : Since US President Barack Obama is hard to mock, jesters are turning their aim to Vice President Joe Biden.

If you're wondering why Obama is "non-jokeable", well it could be that jokers are reluctant to riff on a man they admire, or he's simply a "no-joke making" human being.

"As a comedian, I''''m gonna miss President Bush. Because Barack Obama is not easy to do jokes about. He doesn''''t give you a lot to go on. This is why God gave us Joe Biden," The Chicago Sun-Times quoted American TV host Jay Leno, as saying.

According to David Letterman, Biden''''s most important responsibility is to pick up Obama''''s daughters at school.

As far as Craig Ferguson is concerned, the Scottish-American television host says Obama gave Biden 12 cupcakes for the vice president''''s birthday - "which is a smart gift to give Biden because when his mouth is full of cupcakes he can''''t say anything stupid."

Former Second City member Jason Sudeikis, on NBC''''s "Saturday Night Live," portrayed Biden as, in the words of one critic, "a contained lunatic.''''''''

Sudeikis has said he developed his impersonation by "watching a lot of YouTube," but mainly his impersonation is "all teeth.'''''''' (ANI)