english news 英语新闻-Bernie Sanders speaks during press conference on defending Medicare in Washington D.C

Independent Senator Bernie Sanders (C) speaks during a press conference on defending the Medicare on Capitol Hill in Washington D.C., capital of the United States, Dec. 7, 2016. (Xinhua/Bao Dandan)

U.S.-WASHINGTON D.C.-CAPITOL HILL-MEDICARE-PRESS CONFERENCE

Independent Senator Bernie Sanders (C) speaks during a press conference on defending the Medicare on Capitol Hill in Washington D.C., capital of the United States, Dec. 7, 2016. (Xinhua/Bao Dandan)

U.S.-WASHINGTON D.C.-CAPITOL HILL-MEDICARE-PRESS CONFERENCE

U.S. House minority leader Nancy Pelosi (C) and Independent Senator Bernie Sanders (R) attend a press conference on defending the Medicare on Capitol Hill in Washington D.C., capital of the United States, Dec. 7, 2016. (Xinhua/Bao Dandan)

U.S.-WASHINGTON D.C.-CAPITOL HILL-MEDICARE-PRESS CONFERENCE

U.S. House minority leader Nancy Pelosi (L) speaks about Medicare during a press conference on defending the Medicare on Capitol Hill in Washington D.C., capital of the United States, Dec. 7, 2016. (Xinhua/Bao Dandan)