The early days of 2019—which is to say, the early days of the 2020 campaign—have been dominated by the Democratic Party’s left wing. Early big-name entrants Kamala Harris, Elizabeth Warren, Cory Booker, and Kirsten Gillibrand were all quick to plant their flags squarely on progressive soil. Most tellingly, all four support Bernie Sanders–style Medicare for all and Alexandria Ocasio-Cortez’s Green New Deal, two issues that have emerged as the biggest intraparty litmus tests for the primary season.