Senator Bernie Sanders argued that most Americans want Medicare for all, while critics say similar systems in other countries produce worse outcomes.
The young are typically much less likely to vote, but signs suggest participation levels could soon rise.
Republicans and Democrats are laying out their visions of health care beyond the Affordable Care Act: a single-payer system or state government control.
Posing as ordinary Americans on Facebook and building “warlists” of Twitter accounts, suspected Russian agents infiltrated last year’s election.
Well before most of them will announce they are running, prospective Democratic candidates for president are taking steps to lay the financial foundation for a campaign.