Scott Detrow

Seven Democratic presidential candidates are gathering in Los Angeles for the last debate of 2019. It comes as the Democratic race remains close among the top four candidates.

Bernie Sanders boosted his national reputation by filibustering a tax deal brokered by Joe Biden. Years later, the two are fighting for the Democratic presidential nomination.

Bernie Sanders' prominence as a national political figure can be traced to a moment in 2010: his filibuster criticizing a bipartisan tax deal that extended tax cuts for the wealthy.

Four progressive first-term members of Congress, all women of color, have become sought-after endorsers and candidate surrogates in the Democratic presidential primary.

Indivisible ranked candidates on progressive priorities, including "democracy reforms" they want implemented if a Democrat wins in 2020. Bernie Sanders was a close second, with Joe Biden in last.

Former Vice President Biden got in a spat with a voter in Iowa who challenged him on his son's business activity in Ukraine and his age. It's not the first argument he's had with a voter on the trail.

The California senator entered with high expectations and took off after a blockbuster debate showdown with Joe Biden. But her support and funding fell in recent months.

The New Jersey senator is doing his best to keep his place on the debate stage. He needs to get 4% in four polls in the next two weeks to pass the Democratic National Committee's bar for inclusion.

Joe Biden holds a firm position in the Democratic primary with overwhelming support among black voters. While traveling to Atlanta for this week's debate, his rivals tried to challenge that strength.

Pete Buttigieg may face scrutiny after popping in the polls. Elizabeth Warren provided answers about her health care plan, and now she'll have to defend them. And is the field finally set?

Former Massachusetts Gov. Deval Patrick is making a very late entry into the 2020 Democratic presidential primary. The move underscores uncertainty many leaders feel about the current candidates.

Patrick is joining the Democratic primary field just ahead of the deadline to make the New Hampshire primary ballot. The move highlights worry among moderate Democrats about the current field.

A possible late entry into the Democratic primary by Michael Bloomberg less than three months before the Iowa caucuses would shake up the still-crowded field.

An impeachment trial could keep Elizabeth Warren, Bernie Sanders and other senators running for president stuck in Washington in the final weeks before the Iowa caucuses.

Several Democratic presidential candidates are also sitting senators. If there's a Trump impeachment trial early next year, it could impede their ability to campaign in Iowa before the caucuses.

Defense Secretary Mark Esper said U.S. troops would protect Syrian oil fields from ISIS, and later acknowledged the troops would also prevent Russian and Syrian troops from getting the oil.

As Democratic voters are looking more closely at Sen. Elizabeth Warren as a likely nominee, she answered some of their concerns about her candidacy while campaigning in New Hampshire.

Throughout his career, Edmund Morris repeatedly showed boredom, even disdain, for the traditional biography. In turn, he sometimes injected his books with an artistic flair that got in the way.

South Bend, Indiana Mayor Pete Buttigieg stood out during the last presidential debate. He's now trying to turn that moment into a bump in the polls, focusing most of his attention on Iowa.

After Tuesday night's debate, several Democratic presidential candidates headed back to Iowa, which will hold the first contest in 2020.