FILE - In this July 30, 2015 file photo, Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., waves after speaking at a rally with registered nurses and other community leaders celebrate the 50th anniversary of Medicare and Medicaid, on Capitol Hill Washington. With the Obama administration counting down its final year, many Democrats are finding less to like about the presidents health care law, unsure about its place among their partys achievements. Sanders call for Medicare for all seems to have rekindled aspirations for bigger changes beyond Obamacare. That poses a challenge for Hillary Clinton, whos argued that the health care law is working and the nation needs to build on it, not start over. (AP Photo/Jacquelyn Martin, File)