Most of the prominent Democrats eyeing 2020 presidential bids—including Sens. Kirsten Gillibrand of New York, Cory Booker of New Jersey, and Elizabeth Warren of Massachusetts—champion the idea of “Medicare for all,” suggesting it’s become almost a litmus test for the party’s base. But the notion of government-funded health care has proved a tough sell to Democratic voters in swing districts that will determine control of the House. Many Democratic candidates who made that a centerpiece of their campaigns in key districts this year lost their primaries, in some cases getting clobbered by rivals who offered vaguer health care plans or backed a more incremental approach. Democratic primary voters in battleground districts in Iowa, Texas, Kansas, and New York passed over candidates who emphatically supported single payer. (Paul Demko, Politico)