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WASHINGTON, DC - DECEMBER 07: Sen. Bernie Sanders (L) (I-VT) is greeted by Sen. Chuck Schumer (R) (D-NY) after Sanders spoke at a press conference on Medicare benefits on Capitol Hill December 7, 2016 in Washington, DC. The press conference, held by the group Social Security Works, urged U.S. President-elect Donald Trump and congressional Republicans to "keep their hands off the American people's earned Medicare benefits." (Photo by Win McNamee/Getty Images)

WASHINGTON, DC - DECEMBER 07:  Sen. Bernie Sanders (L) (I-VT) is greeted by Sen. Chuck Schumer (R) (D-NY) after Sanders spoke at a press conference on Medicare benefits on Capitol Hill December 7, 2016 in Washington, DC. The press conference, held by the group Social Security Works, urged U.S. President-elect Donald Trump and congressional Republicans to "keep their hands off the American people's earned Medicare benefits."  (Photo by Win McNamee/Getty Images)