Former Vice President Joe BidenJoe BidenGiuliani says he is unaware of reported federal investigation Trump says Giuliani is still his lawyer Sondland to tell Congress 'no quid pro quo' from Trump: report MORE and former second lady Jill Biden took swipes at President TrumpDonald John TrumpGiuliani says he is unaware of reported federal investigation Louisiana's Democratic governor forced into runoff Lawmakers focus their ire on NBA, not China MORE while speaking at the Human Rights Campaign annual dinner Saturday night.

While introducing her husband, Jill Biden told a childhood story about a confrontation with a neighborhood bully, and appeared to make the comparison to the president.

“There is nothing that makes either of us more angry than a bully,” Jill Biden said. “There’s nothing that’s more unfair or unjust than people using their power to try to make other people feel small, to tell them who they are or what they are capable of, to say their identity doesn’t belong.”

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She added that the two wanted to “pick a fight” with bullies, a comment seen as a subtle hint at a possible Biden challenge to Trump in 2020.

Joe Biden also compared Trump to a bully.

“The president uses the White House as a literal, literal bully pulpit, callously exerting his power over those who have little or none,” he said in his remarks.

The former vice president also said that he wished he and former President Obama had spoken out against Trump sooner.

“Barack and I agreed we would be quiet for the first year to let the new administration get up and running,” Biden said. “God forgive me.”

“What has become of us?” he added later. “Our children are listening and our silence is complicit.”

Biden has spoken out against Trump on a number of occasions, fueling speculation that he is gearing up for a White House bid.

A poll last month found Biden leading Trump by 7 points in a hypothetical 2020 matchup.