Biden Stumbles Over His Words as He Tries to Steady Re-Election Campaign

President Biden sought to steady his re-election campaign by talking with two Black radio hosts for interviews broadcast on Thursday, but he spoke haltingly at points during one interview and struggled to find the right phrase in the other, saying that he was proud to have been “the first Black woman to serve with a Black president.”

He also stumbled over his words during a four-minute Fourth of July speech to military families at the White House, beginning a story about former President Donald J. Trump, calling him “one of our colleagues, the former president” and then adding, “probably shouldn’t say, at any rate” before abruptly ending the story and moving on.

Mr. Biden made the mistake on WURD radio, based in Philadelphia, as he tried to deliver a line that he has repeated before about having pride in serving as vice president for President Barack Obama. Earlier in the interview, he boasted about appointing the first Black woman to the Supreme Court and picking the first Black woman to be vice president.

The president also made a mistake earlier in the interview when he asserted that he had been the first president elected statewide in Delaware. He appeared to mean that he was the first Catholic in the state to be elected statewide, going on to speak admiringly of John F. Kennedy, a Catholic.

Mr. Biden and his top aides have said the president’s activities in the coming days are part of a series of campaign efforts designed to prove to voters, donors and activists that the president’s debate debacle was nothing more than what he has called “a bad night.”

Ammar Moussa, a spokesman for Mr. Biden’s campaign, criticized the news media for making note of the president’s stumbles.