Former Vice President Joe Biden Joe BidenBiden leads Trump by 36 points nationally among Latinos: poll GOP set to release controversial Biden report Can Donald Trump maintain new momentum until this November? MORE blasted President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE on Saturday, saying he "dumbs down" American values.

Biden during an appearance in North Dakota called out Trump for his attacks on people with disabilities and his insults over people's appearances.

"Think about how that dumbs down the values that we Americans have," Biden said, according to a reporter for the Grand Forks Herald in North Dakota.

Biden slamming Trump. Questions “how someone in the highest office in America can look at some and make fun of that they have a disability, or make fun of their weight or make fun of how they look. Think about how that dumbs down the values that we americans have.” #NDpol — Sam Easter (@SamKWEaster) March 17, 2018

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Trump has repeatedly taken aim at individuals for their appearances but especially prompted backlash on the campaign trail when he mocked a disabled reporter during a 2015 rally.

Biden is campaigning on behalf of Sen. Heidi Heitkamp Mary (Heidi) Kathryn HeitkampCentrists, progressives rally around Harris pick for VP 70 former senators propose bipartisan caucus for incumbents Susan Collins set to play pivotal role in impeachment drama MORE (D-N.D.), who is facing a tough reelection bid in November. Trump beat Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE in the state by more than 35 points in 2016.

Speculation has swirled that Biden, 75, could mount a 2020 bid to challenge Trump for the White House, though he has not made any official announcements about his plans.