The grassroots activists who paved the way for single-payer health care’s political moment

If you’re a Democratic party star who’s being talked about as a potential 2020 candidate for president, you probably recently announced your support for single-payer legislation. 

Sen. Bernie Sanders will unveil his Medicare for All bill on Wednesday afternoon, flanked by high-profile co-sponsors including Sens. Kamala Harris (D-CA), Elizabeth Warren (D-MA), Cory Booker (D-NJ), Jeff Merkley (D-OR), Sheldon Whitehouse (D-RI), and Kirsten Gillibrand (D-NY).

It’s a sharp d...