From my post for The Upshot:
Young Americans have been moving left and leaving the G.O.P. in recent years, but a successful Democratic coalition built on the backs of liberal youth is far from a sure thing, especially in the short term.
The party’s problem is straightforward: getting them to actually go to the polls. Politicians know which part of the electorate still butters their bread — and there’s no avocado on it. Those aged 18 to 29 vote at far lower rates than older groups, decreasing their electoral power. But there are at least some signs that their participation levels will improve. And if an increasingly left-leaning voting bloc does become more politically active, there are huge potential gains for the Democratic Party.