SAN FRANCISCO, CA – SEPTEMBER 22: Supporters hold signs as U.S. Sen. Bernie Sanders (I-VT) speaks during a health care rally at the 2017 Convention of the California Nurses Association/National Nurses Organizing Committee on September 22, 2017 in San Francisco, California. Sen. Bernie Sanders addressed the California Nurses Association about his Medicare for All Act of 2017 bill. (Photo by Justin Sullivan/Getty Images)