Warren and Sanders have yanked the conversation—and the party—sharply to the left. The upshot has been a Democratic Party that is more willing to argue over radical ideas than any other time since the days of Lyndon Johnson’s Great Society. Nor are Sanders and Warren alone. Politicians often deemed moderate such as Pete Buttigieg and Kamala Harris have joined the policy arms race, with candidates trying to top one another with their competing plans to remake America. Suddenly the political conversation is dominated by ideas like Medicare for All, a Green New Deal, student debt relief, free public college, statehood for DC and Puerto Rico, and even Supreme Court expansion. It’s telling that Warren has become a leading contender with the catchphrase “I have a plan for that.” Democratic voters seem positively hungry for plans.