Romney screws up Ryan's introduction
Former Mass. governor introduces Ryan as 'next president of U.S'
GOP presidential candidate Mitt Romney accidentally introduces Rep. Paul Ryan as "the next president of the United States" during a campaign rally.
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- A tea party comeback?
- Ousted IRS chief on the hot seat
- Obama: 'I am angry about' IRS
- Holder grilled over AP, IRS scandals
- White House credibility under fire
