Sen. Kamala Harris Kamala HarrisHundreds of lawyers from nation's oldest African American sorority join effort to fight voter suppression Biden picks up endorsement from progressive climate group 350 Action 3 reasons why Biden is misreading the politics of court packing MORE (D-Calif.) spiked in Google searches in the second half of the debate shortly after her contentious back-and-forth with former Vice President Joe Biden Joe BidenPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Hillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Fox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio MORE over his record on civil rights.

Searches for Harris's name surged by 500 percent after the one-hour mark, according to Google Trends. Searches for former Colorado Gov. John Hickenlooper John HickenlooperThe Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' Cook Political Report shifts Colorado Senate race toward Democrat Willie Nelson playing at virtual fundraiser for Hickenlooper MORE (D) and South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBillionaire who donated to Trump in 2016 donates to Biden The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice MORE (D) both increased by 300 percent during the second half.

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Harris and author Marianne Williamson Marianne WilliamsonMarianne Williamson discusses speaking at People's Party Convention Fewer people watched opening night of Democratic convention compared to 2016 Marianne Williamson: Democratic convention 'like binge watching a Marriott commercial' MORE saw the largest spikes in Google searches for their names over the second hour, at various points seeing their names surge in popularity over other top-searched candidates.

Biden and Harris's sharp exchange was one of the most memorable moments of the night. Harris went after Biden's record on civil rights.

Harris brought up the former vice president's past comments touting his work with two segregationist senators, calling it "hurtful."

“On this subject, it cannot be an intellectual debate among Democrats, we have to take it seriously, we have to act swiftly,” Harris said. She then pressed Biden over his former opposition to busing, saying that she personally benefited from busing as a black woman.

Biden hit back, saying, “I did not praise racists. It is not true, number one. Number two, if you want to have this campaign litigated on who supports civil rights and whether I did or not, I’m happy to do that. I was a public defender. I didn’t become a prosecutor." Harris has faced some criticism over her history as a prosecutor in California.

“Do you agree today, do you agree today that you were wrong to oppose busing in America then?” she asked. “Do you agree?”

“I did not oppose busing in America,” Biden said. “What I opposed is busing ordered by the Department of Education. That’s what I opposed.”