Separately, Mr. Giuliani is being charged with defamation by two voting machine companies, Dominion and Smartmatic, for his false claims that the companies were involved in a conspiracy to hand over votes to Mr. Biden.
Mr Giuliani led the effort to undermine the results of the 2020 race in a series of battlefield states, but he was not paid for the work, according to people close to both Mr Giuliani and Mr Trump. His supporters now want the Trump campaign to tap into the $ 250 million they raised in the weeks following the election to pay Mr Giuliani and absorb the costs he incurred in the defamation cases.
"I want to know what the GOP has done with the quarter of $ 1 billion they raised for the legal election campaign," Bernard Kerik, the former New York City Police Commissioner, wrote on Twitter on Sunday. Mr. Giuliani appointed Mr. Kerik when he was Mayor of New York.
Using expletives, Mr. Kerik added that "lawyers and law firms who did not do much work" were nicely paid, while those who worked hard "got nothing".
Mr. Kerik has made similar complaints to some of Mr. Trump's advisers, according to people familiar with the talks, arguing that Mr. Giuliani incurred legal costs in his efforts to help Mr. Trump and that the name Mr. Giuliani's was used to raise money during the election campaign.
In a separate tweet, Mr. Kerik blamed the Chairman of the Republican National Committee, Ronna McDaniel. R.N.C. officials said the group was not making the same open calls to raise money as the Trump campaign to challenge the election results.
An attorney for Mr. Giuliani's, Robert J. Costello, has had discussions with a Mr. Trump attorney about whether any material seized by the F.B.I. must be protected from scrutiny because of the privilege of the attorney-client. Mr. Costello has also raised the question to pay Mr. Giuliani, according to two people briefed on those discussions.
Jason Miller, a spokesman for Mr Trump, declined to comment. Mr Giuliani could not be reached for comment.
Mr. Giuliani had encouraged Mr. Trump to object to the election, and the former president instructed Mr. Giuliani to lead the leadership in November. But as Mr. Giuliani's partner, Maria Ryan, emailed Trump's campaign officials and sought $ 20,000 a day for his work, Mr. Trump declined, The New York Times reports.
Mr. Trump later told his advisers that he did not want Mr. Giuliani to receive any payment, according to people close to the former president who were directly aware of the discussions. Before Mr. Trump left the White House in January, he agreed to reimburse Mr. Giuliani for more than $ 200,000 in expenses, but no compensation.
Some of Mr Giuliani's supporters have blamed Mr Trump's aides – and not the former president – for the impasse. However, people close to Mr Trump said he firmly refused to pay Giuliani.
Mr. Giuliani's advisers were also disappointed that he has not received a federal pardon from Mr Trump, despite the long-running federal investigation into his Ukrainian transactions, a person close to Mr Giuliani said. After months of speculation that Mr. Trump would preemptively pardon Mr. Giuliani, Mr. Giuliani said on his radio show in January that he didn't need a pardon because "I don't commit crimes."
The attempts to reverse the election culminated in a gathering of Mr Trump's supporters near the White House on Jan. 6. After a march to the Capitol, where the results of the electoral college were certified, hundreds of those supporters stormed the building, killing and injuring dozens of Capitol Police officers and others. The events led to Mr Trump's second impeachment trial, and Mr Trump told Mr Giuliani in a private meeting that he could not represent him in the proceedings, people said of the rally.
When asked about Mr. Kerik's tweet during an interview with ABC News, Giuliani's son Andrew said his father's fees should be covered from Trump's campaign treasury.
& # 39; I think he should be indemnified, & # 39; said the younger Mr. Giuliani. & # 39; I think all those Americans who donated after November 3 donated to the legal defense fund. My father was leading the legal team at the time. So I think it is very easy to make a very strong case for him and all the lawyers who have worked there to be indemnified. "
He added, "I would find it very erratic if the president's chief attorney were not reimbursed."
A person close to Mr Giuliani, who was given anonymity because this person was not authorized to discuss the matter publicly, made a related argument, saying that the Trump campaign should be careful to ensure that money is in the war chest was spent in connection with the election effort because it was requested from the public for that purpose.
While there are many differences between the two situations, for some of Mr. Trump's advisers, the standoff with Mr. Giuliani has generated uncomfortable echoes of a similar dispute with another former Mr. Trump's personal attorney, Michael D. Cohen. .
In 2019, Mr. Cohen said the Trump Organization, Mr. Trump's family business, had violated an agreement with him to cover his legal costs. In a lawsuit, Mr. Cohen said the company initially paid some of the bills after the F.B.I. searched his apartment and office in April 2018. But, he said in the lawsuit, company officials stopped payments when they discovered around June 2018 that he was preparing to work with federal investigators.
Mr. Cohen later that year pleaded guilty to charges related to tax evasion, as well as a campaign finance charge related to his 2016 payment of hush money to a porn movie star who claimed to have had an affair with Mr. Trump. Mr. Cohen eventually testified about Mr. Trump in Congress and assisted the investigation led by Special Counsel Robert S. Mueller III into a possible conspiracy between the Trump campaign and Russian officials.
After the F.B.I. searched Mr. Cohen's home and office, he filed a civil suit against the U.S. attorney in Manhattan, joining Mr. Trump to prevent federal officials from accessing material that could be protected by attorney's privilege. client between Mr. Trump and Mr. Trump. Cohen.
Mr. Giuliani's lawyers, according to one of those close to the former mayor, are considering filing similar proceedings in his case. A lawyer who advised Mr. Giuliani, Alan Dershowitz, told CNN it would be appropriate for Mr. Trump to join such an effort. Mr. Dershowitz confirmed the comment to The Times.
Mr. Giuliani recently added four new attorneys to his team: Arthur L. Aidala, a former Brooklyn prosecutor and former Fox News commentator; Barry Kamins, a retired professor of justice and law from the New York Supreme Court; retired New York Appellate Division Justice John Leventhal; and Michael T. Jaccarino, a former Brooklyn district attorney.
William K. Rashbaum contributed to the reporting.