The sixth Democratic debate and the final battle of 2019 for the candidates attempting to end President Trump's tenure took place Thursday night. Unlike past debates, only seven candidates were able to qualify for the stage this time, as the requirements to enter increased even more.

Former Vice President Joe Biden, Sens. Bernie Sanders, Elizabeth Warren and Amy Klobuchar, South Bend, Indiana Mayor Pete Buttigieg, entrepreneur Andrew Yang and philanthropist Tom Steyer were the only candidates able to make the debate stage this time around.

For those who were unable to watch, here are the six biggest moments from December's Democratic debate.

1. Biden called for impeachment as a moral issue.

Biden brought forth the moral argument surrounding impeachment, highlighting the international perception of America as a large reason why President Trump should not be allowed to remain in office.

"It was a constitutional imperative for the House to act as it did," Biden said. "Trump's response that only half of people want him thrown out of office is a dumbing down of the presidency beyond even what I thought he would do."

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@JoeBiden said it was a "constitutional necessity" for the House to impeach President Donald Trump ???????? Do you believe The Senate will remove him from office? Drop your thoughts below ???????? #DemDebate

A post shared by Blavity : Politics (@blavitypolitics) on Dec 19, 2019 at 5:24pm PST

2. A moderator mixed up Andrew Yang and Tom Steyer.

In a slightly less serious moment in the evening's events, PBS moderator Judy Woodruff called on Andrew Yang while attempting to address a question to Tom Steyer on the opposite end of the stage.

Although neither Yang nor Steyer have polled in the top tier of candidates, messing up their names to that extent was embarrassing.

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Oops ????????‍♀️???? During the #DemDebate, modarater #JudyWoodruff mixed up 2020 candidates #TomSteyer and #AndrewYang ???? Watch the flub above, and swipe to see reactions ????????

A post shared by Blavity : Politics (@blavitypolitics) on Dec 19, 2019 at 6:02pm PST

Yang has had his name mixed up in the media before, with an MSNBC host referring to him as 'John Yang.'

3. Andrew Yang spoke about being the only person of color on stage.

Despite the name mix-up, Yang got a moment to shine after taking a question about being the only person of color to qualify for the debate. Sen Kamala Harris dropped out of the race earlier this month, and Sen. Cory Booker was unable to reach the threshold.

Yang brought the issue back to his signature campaign promise and linked the lack of diversity on the stage to the lack of diversity in the donor base.

"Do you know what you need to contribute to a political campaign?" Yang asked. "Disposable income."

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@AndrewYang2020 discussed being the ONLY candidate of color on the #DemDebate stage ???? (Shoutout to @CoryBooker ????????) #andrewyang #yanggang

A post shared by Blavity : Politics (@blavitypolitics) on Dec 19, 2019 at 6:12pm PST

4. Tom Steyer said climate change will be his number one priority as president.

Steyer took a large stance on climate change, pledging to declare a State of Emergency on day one of his presidency.

He also made the argument that the change from fossil fuels to renewable clean energy sources would create thousands of jobs and mark a potential booming economic future.

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Points ???????? were ???????? made ???????? While discussing the climate crisis, @TomSteyer specifically called out it's disproportionate effect on Black and Brown communities. #DemDebate #tomsteyer #democrats

A post shared by Blavity : Politics (@blavitypolitics) on Dec 19, 2019 at 6:31pm PST

5. Elizabeth Warren said she'd be the youngest woman inaugurated as president.

Sen. Warren took time to land a shot of her own after moderators questioned her about her age, bringing up the fact that she would be the oldest person ever inaugurated for a first term into the presidency. Warren hit back, responding by saying she would be the youngest woman ever inaugurated.

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Moderator: "Senator Warren, you would be the oldest president ever inaugurated." @ElizabethWarren: "I'd also be the youngest woman ever inaugurated." Mic drop ???? #DemDebate #ElizabethWarren

A post shared by Blavity : Politics (@blavitypolitics) on Dec 19, 2019 at 6:37pm PST

6. Pete Buttigieg defended his "wine cave" fundraisers.

Despite many of the more aggressive candidates not being present this time around, Sen. Warren was able to land one of the most memorable attacks of the Democratic primary so far.

The Massachusetts senator ripped into Mayor Buttigieg for his willingness to hold closed-door fundraisers with big-money donors.

"The mayor just recently had a fundraiser that was held in a wine cave filled with crystals and served $900 a bottle wine," Warren said. "Think about who comes to that."

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Like this if you've never been to a wine cave ???? @pete.buttigieg and @elizabethwarren went at it over campaign funding during the #DemDebate.

A post shared by Blavity : Politics (@blavitypolitics) on Dec 19, 2019 at 7:53pm PST

Moving into the 2020 Democratic primary debate, the requirements to enter will increase once again. Candidates will now be required to receive 5% or more support in at least four polls or receive 7% or more support in two single-state polls in Iowa, New Hampshire, South Carolina and/or Nevada. They are also required to receive donations from at least 225,000 unique donors and a minimum of 1,000 unique donors per state in at least 20 U.S. states, U.S. territories or the District of Columbia by January 11, 2020.

Watch our election recap here:

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Did you catch the debates last night? From @ElizabethWarren’s clapback to @AndrewYang2020’s shoutout to @CoryBooker, our senior political editor Kandist Mallett breaks down some of the top stories of the week ???????? Who do you think won this round at the #DemDebate? Drop a comment and let us know ????????

A post shared by Blavity : Politics (@blavitypolitics) on Dec 20, 2019 at 4:09pm PST

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