Romney: ‘Nothing hidden’ in withheld tax returns
TRENDING: Biden to Romney: ‘Show your papers’
Romney rips Obama's tax proposal
Biden: Romney wants Hispanics ‘to show your papers,’ but 'won't show his'
Biden: 'Mitt Romney wants you to show your papers, but he won't show us his'
Eric Holder revs up NAACP meeting
Repealing health law would mean more benefits for members of Congress