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Democratic presidential candidate Bernie Sanders addresses a rally Wednesday at the Santa Clara County Fairgrounds in San Jose, Calif. The senator's campaign is intently focused on a big win in the state on June 7, and has poured money into TV ads there. Josh Edelson/AFP/Getty Images hide caption

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Josh Edelson/AFP/Getty Images

Donald Trump arrives at the Republican National Committee headquarters on Capitol Hill last week to meet with House Speaker Paul Ryan and other GOP leaders. Nicholas Kamm/AFP/Getty Images hide caption

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Nicholas Kamm/AFP/Getty Images

'Highly Sophisticated Killers' No More. Trump Embraces Big Donors

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The apparent Republican nominee, Donald Trump, at Trump Tower in Manhattan on the night of his victory in Indiana. View Press/Corbis via Getty Images hide caption

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View Press/Corbis via Getty Images

Will Donald Trump Get Back The $38 Million He Lent His Campaign?

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A supporter of Democratic presidential candidate Hillary Clinton wears campaign buttons as she listens to former President Bill Clinton at an event in Indiana. Joe Raedle/Getty Images hide caption

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Joe Raedle/Getty Images

Protesters with a coalition of progressive groups sit in front of the U.S. Capitol steps Monday as part of the Democracy Spring demonstration. Peter Overby/NPR hide caption

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Peter Overby/NPR

Hundreds Protesting Political System Arrested On Capitol's Steps

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Washington, D.C., Mayor Muriel Bowser last month. Larry French/Getty Images hide caption

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Larry French/Getty Images

D.C. PAC Shutters, Highlighting Fine Ethical Line For Groups Across The Country

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Demonstrators march in the snow outside the White House during a rally against the Supreme Court's decision five years ago in favor of Citizens United, which allows private citizens and corporations to make unlimited donations for political campaigns. Nicholas Kamm/AFP/Getty Images hide caption

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Nicholas Kamm/AFP/Getty Images