Sen. Bernie Sanders of Vermont announced Tuesday that he is running for president again. The FiveThirtyEight Politics podcast team describes what his paths to both success and failure in the 2020 Democratic primary could look like. It’s possible that his bedrock of support from 2016 could win him a plurality in a crowded 2020 field. But winning with a broad coalition of Democratic voters might be a more difficult task.

The crew also follows up on congressional Republican reactions to President Trump’s national emergency declaration.

You can listen to the episode by clicking the “play” button in the audio player above or by downloading it in iTunes, the ESPN App or your favorite podcast platform. If you are new to podcasts, learn how to listen.

The FiveThirtyEight Politics podcast publishes Monday evenings, with occasional special episodes throughout the week. Help new listeners discover the show by leaving us a rating and review on iTunes. Have a comment, question or suggestion for “good polling vs. bad polling”? Get in touch by email, on Twitteror in the comments.