Elizabeth Warren

There are now no more official debates before Democrats begin voting.

Tuesday night's debate was the last before the Iowa caucuses on Feb. 3, and it featured six of the 12 remaining candidates — the top four of whom polls show to be neck and neck.

Democratic primary voters got a substantive debate in which the candidates clashed over what it means to be commander in chief, gender politics and, of course, health care.

Here are four takeaways from Tuesday night's debate:

Sen. Elizabeth Warren, D-Mass., has pledged to cancel up to $50,000 of debt for 95% of student loan borrowers if she is elected president. Sen. Bernie Sanders, I-Vt., has proposed an even more generous plan if he's elected.

Update at 3:30 p.m. ET

We're up to the seventh debate, and down to six candidates.

The leading Democratic presidential candidates return to the debate stage Tuesday at 9 p.m. ET — this time in Iowa, which hosts the first-in-the-nation caucuses in less than three weeks.

Updated at 12:25 p.m. ET

Viewers tuning in for the latest Democratic presidential candidates' debate Tuesday night may sense something missing in Des Moines.

The Democratic stage will be the smallest yet for next Tuesday's Iowa debate, with just six candidates set to qualify.

Billionaire activist Tom Steyer on Thursday likely became the latest candidate to qualify after two Fox News polls from Nevada and South Carolina showed him in the double digits. Steyer has been spending millions of dollars in early states to boost his chances.

Just days after ending his campaign for president, former Housing and Urban Development Secretary Julián Castro is endorsing Massachusetts Sen. Elizabeth Warren.

The two will hold a rally together Tuesday evening in Brooklyn.

Updated at 2:06 p.m. ET

A three-month window that began with a heart attack ended as Vermont Sen. Bernie Sanders' strongest fundraising quarter yet.

Sanders' campaign announced it raised $34.5 million in October, November and December — nearly $10 million more than he had raised in the previous quarter. According to the campaign, $18 million came in from 900,000 individual donations in December alone, as Sanders drew larger and larger crowds to rallies in early voting states such as Iowa and New Hampshire.

Updated at 5:35 p.m. ET

Amid a labor dispute at the site of next week's presidential primary debate, all seven Democratic candidates who made the stage are siding with unions and threatening not to participate in the event.

Candidates are scheduled to meet for the Democratic presidential debate on the Loyola Marymount University campus in Los Angeles on Dec. 19.

There was a time when "Medicare for All" was not a part of Sen. Elizabeth Warren's presidential campaign. It was March.

Updated at 10:05 a.m. ET

The former law professor in the 2020 field is the only presidential candidate to earn an A in a new scorecard, released on Wednesday by the grassroots progressive group Indivisible.

A few weeks ago, Elizabeth Warren made huge news with her plan to finance "Medicare for All." But as part of it, the Massachusetts senator made a big change to one of her other major policy goals: she boosted the size of the wealth tax she wants to impose on the very rich: The top rate went from 3% to 6%, giving her trillions more dollars in theoretical revenue to fund the sweeping program.

Presidential hopefuls Elizabeth Warren and Bernie Sanders want to tear up your student loans and set you financially free. That's popular among voters – especially those struggling to pay off this debt.

Other Democratic candidates have more modest plans. But economists say the dramatic proposals from Sanders and Warren to free millions of Americans from the burden of student debt could boost the economy in significant ways and help combat income inequality.