Democratic presidential candidate Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE saw 28,000 supporters attend his rally in Portland, Ore. on Sunday, setting a record for the largest number of supporters at a political event in the 2016 race.

“Whoa. This is an unbelievable turnout,” Sanders said after walking onstage at an NBA arena.

Michael Lewellen, an arena spokesman, said that more than 19,000 people filled the center, with thousands more lined up outside, according to Sanders's campaign.

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Sunday's showing smashed Sanders's attendance record of 15,000 set the previous day in Seattle.

The independent Vermont senator, who has emerged as the main Democratic presidential foil to front-runner Hillary Clinton, has repeatedly garnered attention for drawing huge crowds on the campaign trail.

"Excuse me, I don't think he is drawing bigger crowds than me," Donald Trump, who currently sits atop the GOP presidential field, said on MSNBC's "Morning Joe."

"Have you drawn a crowd of 25,000?" Bloomberg's Mark Halperin pressed.

"No, 15. But I haven't — excuse me, I'm not finished yet," Trump said.

During Sanders's rally on Sunday, he spoke of income inequality, as well as a push for criminal justice reform.

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“There is no candidate who will fight harder to end institutional racism in this country and to reform our broken criminal justice system,” he said.

According to CNN, Sanders’s campaign employed a chant Sunday to drown out shouts from protesters after being dogged by Black Lives Matters activists at several events.

Newly minted National Press Secretary Symone Sanders, an African-American woman, told the audience to chant, "We stand together," if a protest were to break out, according to CNN.

That came after Sanders was blocked from speaking at another event in Seattle on Saturday due to protestors.