DENVER, Colorado (CNN) - Joe Biden has served for nearly four decades as Senator from Delaware. But nowadays Delaware is a reliable Democratic state. So with Delaware already considered a safe state for Obama, what does Biden bring to the ticket in terms of the battle for electoral votes?
Two things right off the bat. Biden was born in Scranton, Pennsylvania and the thought is that he can help Obama keep this crucial battleground state in Democratic hands.
Watch: Biden speaks his mind
Biden is also Catholic.
"“White Catholics are classic swing voters. Obama had trouble courting them in the Democratic primaries, as Hillary Clinton won the majority of their votes,” says CNN Senior Political Analyst Bill Schneider.
So the thought is that Biden could help Obama in the fight for working class and Catholic voters - voting blocs that could prove critical in several crucial battleground states this fall.