As you will hear in this video clip from today's announcement that Joe Biden is Obama's running mate, Barack Obama got confused about whether Biden would be on top of the ticket or on the bottom! Here is how the McCain Campaign has already jumped on the gaffe:

“Barack Obama sounded as though he turned over the top spot on the ticket today to his new mentor, when he introduced Joe Biden as the next president. The reality is that nothing has changed since Joe Biden first made his assessment that Barack Obama is not ready to lead. He wasn’t ready then and he isn’t ready now.”

Hat Tip: Hot Air.com