If weekend speculation that Senator Joe Biden is heading Obama's VP short-list proves accurate, it will represent a huge gamble by the Democrat candidate.
Biden, you may remember, once plagiarised a speech by Neil Kinnock and was forced to withdraw from his party's presidential nomination race in 1988. Imagine the Republican attack-dogs getting their teeth into that piece of meat.
Also, being a Senator for Delaware, Biden does not represent Middle America in a way that Obama surely needs his running-mate to do in order to balance the image of aloof elitism.
In Biden's favour, of course, is his expertise on foreign policy and his consistent call for the US to use diplomacy instead of military power.
He would make an excellent Secretary of State.
Governor Tim Kaine of Virginia would be an outstanding choice as VP running-mate.