US Sen. Bernie Sanders, whose insurgent 2016 presidential campaign reshaped Democratic politics, announces that he is running for president in 2020.

“Our campaign is not only about defeating Donald Trump,” the 77-year-old self-described democratic socialist from Vermont says in an email to supporters. “Our campaign is about transforming our country and creating a government based on the principles of economic, social, racial and environmental justice.”

An enthusiastic progressive who embraces proposals ranging from Medicare for All to free college tuition, Sanders stunned the Democratic establishment in 2016 with his spirited challenge to Hillary Clinton. While she ultimately became the party’s nominee, his campaign helped lay the groundwork for the leftward lurch that has dominated Democratic politics in the Trump era.

The question now for Sanders is whether he can stand out in a crowded field of Democratic presidential candidates who also embrace many of his policy ideas and are newer to the national political stage. That’s far different from 2016, when he was Clinton’s lone progressive adversary.

— AP