President Obama walks to the podium at his 2008 nominating convention. Lawmakers are inserting into the spending bill a provision allowing political parties to collect up to $97,200 from each donor to pay for their conventions. Chuck Kennedy,Scott Andrews/AP hide caption

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Democratic presidential candidate George McGovern talks about the bombs being used in Vietnam at a $250-a-person fundraising dinner in Los Angeles on Sept. 27, 1972. AP hide caption

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Cristina Saralegui waves at the Democratic National Convention in Charlotte, N.C., on Wednesday. Joe Raedle/Getty Images hide caption

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San Antonio Mayor Julian Castro, left, and his twin brother State Rep. Joaquin Castro give an interview during preparations for the Democratic National Convention at Time Warner Cable Arena on Monday. Streeter Lecka/Getty Images hide caption

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