EXCLUSIVE: Hunter Biden’s ex-business associate, Tony Bobulinski, suggested he and the Biden family appear together for public testimony before Congress after lawyers for the president’s son alleged Bobulinski lied to the FBI about the nature of his business relationship.Fox News obtained a copy of a 10-page letter Hunter Biden’s attorney, Abbe Lowell, sent to U.S. Attorney for the District of Columbia Matthew Graves, claiming Bobulinski lied to the FBI during an interview Oct. 23, 2020, about his business dealings with the president’s son.Lowell called for Graves to investigate Bobulinski for “false” statements regarding his work. Bobulinski worked with Hunter Biden to create the joint venture SinoHawk Holdings with Chinese energy company CEFC.An attorney for Bobulinski provided Fox News Digital a statement on behalf of his client, denying Lowell’s allegations.BOBULINSKI OFFERED TO TESTIFY AT HUNTER BIDEN GRAND JURY BUT ‘NEVER HEARD BACK’: SOURCE Tony Bobulinski, who claims to have been an associate of Hunter Biden, speaks to reporters at a hotel in Nashville Oct. 22, 2020, ahead of the final presidential debate. (Mandel Ngan/AFP via Getty Images)”All of the allegations contained in Mr. Lowell’s 10-page letter to U.S. Attorney Graves are patently false, and I look forward to exposing these lies and laying out the facts in a public forum in short order,” Bobulinski said in the statement. “The sad thing for our country is that Hunter, Jim and Joe Biden along with Abbe Lowell know they are all false and are trying to weaponize the DOJ against me.”If Hunter Biden and the Biden family are so determined to ensure that the full truth is put before the American people, Hunter, Jim, Joe and I should all appear together before Congress, publicly and under oath,” he continued. “They can name the date, time and place, and I would certainly be willing to do that for the American people.”Lowell, in the letter, claimed Bobulinski “lied about the business discussions among the partners involved” in the joint venture. President Biden’s son Hunter Biden exits J. Caleb Boggs Federal Building in Delaware July 26, 2023. (Celal Gunes/Anadolu Agency via Getty Images)”The materials reveal the extraordinary lengths Mr. Bobulinski and other individuals were willing to go to implicate Mr. Biden or members of his family in some false and meritless allegations of wrongdoing,” Lowell wrote. “Even in an era in which people peddle knowing lies with the goal of their falsehoods being repeated and disseminated for their political advantage, these statements by Mr. Bobulinski cannot and must not go unchecked.”Lowell also alleged Bobulinski was never in Miami in 2017 for initial discussions with Hunter Biden, CEFC chairman Ye Jianming and other associates.EXCLUSIVE: HUNTER BIDEN BUSINESS ASSOCIATE’S TEXT MESSAGES INDICATE MEETING WITH JOE BIDENLowell references an infamous May 13, 2017, email that includes a breakdown of the “financial capitalization of the joint venture with CEFC.”The email, first reported by Fox News Digital in October 2020, shows a proposed equity split with references “20” for “H” and “10 held by H for the big guy?” with no further details. President Biden and son Hunter Biden (AP Photo/Andrew Harnik)Bobulinski has repeatedly said “the big guy” was Joe Biden. IRS whistleblowers Gary Shapley and Joseph Ziegler, who claimed politics influenced the years-long federal investigation into Hunter Biden, also said “the big guy” was known to be Joe Biden.HUNTER BIDEN INVESTIGATORS LIMITED QUESTIONS ABOUT ‘DAD,’ ‘BIG GUY’ DESPITE FBI, IRS OBJECTIONS: WHISTLEBLOWERLowell, in the letter, claimed Bobulinski was “making things up” and claimed Bobulinski “has no basis in fact by which to assert that there was a reference to the ‘big guy’ or that it was not his own musing or that it was a reference to Vice President Joe Biden.” James Biden, brother of President Biden (AP)Lowell said Bobulinski’s “false statements are obviously made to greatly exaggerate Mr. Bobulinski’s short-lived business relationship” with Hunter Biden “in order to create a false narrative that Mr. Biden and Jim Biden were somehow involved in off-the-books business with CEFC Chairman Ye while Joseph Biden was still Vice President.”Lowell said Bobulinski’s “lie” is the “same false narrative that serves as the improper and illusory basis of an impeachment inquiry by House Republicans and the justification for Mr. Bobulinski’s testimony.”HUNTER DEMANDED $10M FROM CHINESE ENERGY FIRM BECAUSE ‘BIDENS ARE THE BEST,’ HAVE ‘CONNECTIONS’The House Oversight Committee, which is jointly leading the investigation with the House Judiciary and House Ways & Means Committees, reacted to Lowell’s request on “X,” formerly Twitter, Friday afternoon. James Comer, R-Ky. (Tom Williams/CQ-Roll Call, Inc via Getty Images)”Hunter Biden and his legal team are once again attacking anyone who speaks out against the Bidens,” the Oversight Committee wrote. “This time, their target is Tony Bobulinski, a potential witness in our investigation.CLICK HERE TO GET THE FOX NEWS APP”We will not tolerate witness intimidation. The truth will come out soon enough despite the Biden team’s threatening tactics. We will give Hunter the opportunity to clear the air and speak with us soon.” Brooke Singman is a Fox News Digital politics reporter. You can reach her at Brooke.Singman@Fox.com or @BrookeSingman on Twitter.