Democrats have a lengthy history of refusing to accept the results of elections they lost.
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12 Minutes of Democrats Denying Election Results
WASHINGTON, DC - DECEMBER 08: Former U.S. Secretary of State Hillary Clinton (R) shares a moment with Vice President Joseph Biden (L) during a leadership portrait unveiling ceremony for Senate Minority Leader Sen. Harry Reid (D-NV) December 8, 2016 on Capitol Hill in Washington, DC. The leadership portrait unveiling ceremony was held to honor the outgoing Democratic leader. (Photo by Alex Wong/Getty Images)