Trump eventually acquiesced, but Giuliani and campaign aides have continued to agitate for the additional debate. In his letter Wednesday, Giuliani requested the conference call between the commission and the Biden campaign to at least begin formal talks about adding the debate.

While Trump’s chances of getting another crack at Biden appear slim — he is down in the polls and having agreed to three has little leverage to negotiate — his campaign argues that people who plan to vote early deserve a chance to see the two candidates on a single stage before casting their ballots.

Giuliani did not immediately respond to a request for comment.

TJ Ducklo, a spokesman for Biden, said the former vice president has little appetite for getting involved in “debate drama or debate distractions” from the Trump campaign.

“We have accepted the proposal for the debates proposed by, hosted by and conducted by the nonpartisan debate commission, as has every major party nominee for decades,” Ducklo said Friday. “The last four presidents seeking reelection found the commission's debates adequate to make their case for reelection; if Donald Trump thinks he needs something different, that says more about his failed presidency than it does about the debate schedule.”