Andrew Yang's 'Asian man who likes math' comment

During his opening statement, the entrepreneur received a big reaction from the crowd when he said, \"We need to do the opposite of much of what we're doing right now, and the opposite of Donald Trump is an Asian man who likes math.\"

\"PHOTO:
Jim Watson/AFP/Getty Images
PHOTO: Democratic presidential hopeful entrepreneur Andrew Yang delivers his opening statement during the second round of the second Democratic primary debate in Detroit, July 31, 2019.
>

Cory Booker's 's---hole countries' comment

During a discussion on immigration, the New Jersey senator took the opportunity to reference a Trump-ism from earlier this year that sparked a firestorm of controversy.

\"That's playing into what the Republicans want, to pit some immigrants against other immigrants,\" Booker said. \"Some are from s---hole countries and some are from working countries. We need to reform this whole immigration system and begin to be the country that says everyone has worth and dignity and this should be a country that honors everyone.\"

Kirsten Gillibrand's 'Um,' 'Clorox the Oval Office' comments

Immediately after that 's---hole countries' zinger from Booker, CNN's Don Lemon turned to Gillibrand to ask for her response. But in that moment, the New York senator seemed to be caught off guard.

\"Um--,\" she said, to much laughter from the crowd, before she recovered.

Later in the debate, Gillibrand got a big audience response when she said, \"The first thing that I'm going to do when I'm president is I'm going to Clorox the Oval Office.\"

\"PHOTO:
Jim Watson/AFP/Getty Images
PHOTO: Democratic presidential hopeful Sen. Kirsten Gillibrand delivers her opening statement during the second round of the second Democratic primary debate in Detroit, July 31, 2019.
>

Joe Biden's 'Excuse me, the future president' comment, followed by Cory Booker's 'Kool-Aid' comment

Another moment of Booker and Biden slugging it out came when the two contenders were discussing criminal justice reform. As they were arguing over who had passed what reform bill, the former vice president sort of stumbled and seemed to, jokingly, endorse Booker for president.

\"The fact is that the bills that the president -- excuse me, the future president, that the senator is talking about, are bills that were passed years ago and they were passed overwhelmingly,\" Biden said.

\"PHOTO:
Lucas Jackson/Reuters
PHOTO: Sen. Cory Booker speaks as former Vice President Joe Biden gestures on the second night of the second 2020 Democratic presidential debate in Detroit, July 31, 2019.
>

When CNN's Jake Tapper asked Booker for his response, Booker didn't hold back, starting with, \"Well, first of all I’m grateful that he endorsed my presidency already\" to much laughter from the audience.

Booker later followed with another zinger as he and Biden were arguing over comparing their records of handling crime bills.

\"There's a saying in my community that you're dipping into the Kool-Aid and you don't even know the flavor. You need to come to the city and see the reforms we put in place,\" said Booker, who is a former mayor of Newark.

And it to bring it full circle, the official Kool-Aid Twitter account jumped into the fray with this tweet:

#Ahem @SenBooker OH YEAH #WeKnowTheFlavor #DemDebate pic.twitter.com/Xaq1bbFifB

— Kool-Aid (@koolaid) August 1, 2019
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