Mike Bloomberg's 2020 chances rise while Joe Biden crashes
CNN's latest poll on 2020 Democrats
The New Hampshire Democratic Primaries - How They Won and Lost - Edison Research
Joe Biden's extensive policy agenda, explained - Vox
Democrats clash over electability in struggle to oust Trump | PBS NewsHour
It Felt Like Watching the End of the Biden Campaign”: Explaining the Weird Persistence and Stunning Weakness of Biden, Putative Front-Runner | Vanity Fair
Biden, Warren, Sanders stay on top; health is now an issue for Sanders: POLL - ABC News
Joe Biden - Wikipedia
National poll: Biden, Warren and Sanders locked together at top of primary - POLITICO
Poll: Warren closing in on Biden's lead with climate-focused voters | The Hill
Joe Biden May Be Slipping in 2020 Race and Not Because of Ukraine - Bloomberg
Biden, Warren and Sanders statistically tied in national poll | The Hill
Can Biden Bridge the Democratic Age Gap? - YES! Magazine Solutions Journalism
2020 Democratic polls: Biden, Warren, Harris, Sanders on top in early contests, CBS News Battleground Tracker finds - CBS News
Joe Biden: Latest News, Top Stories & Analysis - POLITICO
National poll: Biden, Warren and Sanders locked together at top of primary - POLITICO
The electability difference between Elizabeth Warren and Joe Biden | CNN Politics
Warren Closes the Electability Gap — Avalanche | Unlock deep human understanding
What's happened to Warren, Biden? Dismal showings and questions about the future.