President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE blasted former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE on Thursday at a campaign rally in Minneapolis over his legacy as vice president and affection for former President Obama.

During his rally, Trump accused Biden of only being viewed favorably because Biden "understood how to kiss Barack Obama Barack Hussein ObamaDemocrats ramp up pressure on Lieberman to drop out of Georgia Senate race The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE's ass," a charge that was met with loud cheers and scattered boos for the Democratic presidential contender.

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"He was never considered smart. He was never considered a good senator," Trump added of Biden, while also taking aim at Hunter Biden, the vice president's son whom the president has accused Biden of using his office to help.

Trump says Biden "was only a good vice president because he understood how to kiss Barack Obama's ass." #BeBest pic.twitter.com/e1GyMd6TAv — Aaron Rupar (@atrupar) October 11, 2019

Biden slammed Trump's remarks later in the evening after attending an LGBT forum hosted by CNN and the Human Rights Campaign (HRC).

"I spent my night at the HRC forum talking about the fundamental respect every human being deserves. You spent yours showing how little respect for anyone else you have. America is so much stronger than your weakness, @realDonaldTrump," Biden tweeted.

I spent my night at the HRC forum talking about the fundamental respect every human being deserves. You spent yours showing how little respect for anyone else you have. America is so much stronger than your weakness, @realDonaldTrump. — Joe Biden (@JoeBiden) October 11, 2019

Earlier in his address at the rally, Trump also touched on the allegations of Biden's efforts to oust a Ukrainian prosecutor while serving as vice president in 2016.

Trump has said the move was due to the prosecutor's investigation of Burisma, a company on which Hunter Biden served as a board member, though no evidence has emerged that Biden was acting with his son's interests in mind.

"It's not unsubstantiated, it's fact," Trump argued Thursday night.

The president's attempts to spur investigations by foreign nations including Ukraine into Biden has become the center of an impeachment inquiry in the House, which the White House has refused to cooperate with and labeled an attempt by Democrats to overturn the 2016 election.

Updated: Oct. 11 at 12:46 a.m.