From the AP:
The loquacious Delaware senator brings more than verbiage to Obama's side. Biden is a foreign policy heavyweight with a decade longer in the Senate than the seasoned Republican presidential candidate, John McCain. That's almost three more decades of experience than his new boss.
In Washington, Biden, 65, is known as a collegial figure even when he's competitive — one who can spin flowery praise one moment and biting fulmination the next.