Mitt Romney tells joke about Obama

Campaigning in Iowa for Republican senate candidate Joni Ernst, Mitt Romney took aim at President Obama with a humorous jab.

President Obama went to the bank to cash a check and he didn't have his ID.
And the teller said, 'You've got to prove who you are.'
He said, 'How should I do that?'
She said, 'the other day Phil Mickelson came in, he didn't have his ID but he set up a little cup on the ground, took a golf ball, putted it right into that cup so they knew it was Phil Mickelson. We cashed his check.
And then Andre Agassi came in. And Andre Agassi didn't have his ID either. He put a little target on the wall, took a tennis ball and racquet — hit it onto that target time and again. We knew that was Andre Agassi so we cashed his check.
And she said to him, 'Is there anything you can do to prove who you are?'
And [Obama] said, 'I don't have a clue.'
And she said, 'Well, Mr. President, do you want your money in small bills or large bills?'

Source: Yahoo