Bolton book alleges Trump tied Ukraine aid freeze to Biden investigations: NYT

Former national security adviser John BoltonJohn BoltonTrump envoy says US ready to talk to North Korea but rebukes Pyongyang counterpart Why Trump can't make up his mind on China The benefits of American disinterest in world affairs MORE reportedly claims in his as yet unpublished memoir that President TrumpDonald John TrumpTrump on Kanye West's presidential run: 'He is always going to be for us' Marie Yovanovitch on Vindman retirement: He 'deserved better than this. Our country deserved better than this' Trump says Biden has been 'brainwashed': 'He's been taken over by the radical left' MORE sought to tie hundreds of millions of dollars in aid to Ukraine to his requests for the country's leaders to investigate former Vice President Joe BidenJoe BidenTrump says Biden has been 'brainwashed': 'He's been taken over by the radical left' Trump says he'll wear mask during upcoming trip to Walter Reed Latino group 'Mi Familia Vota' launches M voter turnout campaign targeting swing states MORE and his son Hunter Biden.

Multiple sources familiar with Bolton's book told The New York Times that he writes that President Trump personally told him that $391 million in aid to Ukraine should be frozen until Ukrainian officials announced the investigations, including one into the Democratic National Committee.

The book, which does not have a publication date as of yet, has been submitted to the White House for review. White House officials did not immediately return a request for comment from The Hill on the report.

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An attorney for President Trump, Rudy GiulianiRudy GiulianiNadler: Barr dealings with Berman came 'awfully close to bribery' READ: Ousted Manhattan US Attorney Berman testifies Barr 'repeatedly urged' him to resign Ousted Manhattan US Attorney Berman to testify before House next week MORE, responded in a statement obtained by ABC News: "I used to like and respect John, and tell people they were wrong about how irresponsible he was. I was wrong."

"He never once expressed concern to me. If he had confronted me, I could have explained it to him.....He wasn’t man enough to just ask and instead makes false and irresponsible barges to write a book about his failed career."

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The report comes as the Senate has debated for days over whether to allow witnesses in Trump's ongoing impeachment trial beyond those who spoke to House investigators in past months. 

Senate Minority Leader Charles SchumerChuck SchumerA renewed emphasis on research and development funding is needed from the government Data shows seven Senate Democrats have majority non-white staffs Trump may be DACA participants' best hope, but will Democrats play ball? MORE (D-N.Y.), who has pressed Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellHouse chairman asks CDC director to testify on reopening schools during pandemic Senate GOP hedges on attending Trump's convention amid coronavirus uptick Pelosi says House won't cave to Senate on worker COVID-19 protections MORE (R-Ky.) to allow such witnesses to testify, reiterated his demand following news of Bolton's allegations.

"John Bolton has the evidence," he tweeted. "It’s up to four Senate Republicans to ensure that John Bolton, Mick MulvaneyMick MulvaneyOVERNIGHT ENERGY: WH pushed for 'correction' to Weather Service tweet contradicting Trump in 'Sharpiegate' incident, watchdog says | Supreme Court rules that large swath of Oklahoma belongs to Native American tribe WH pushed for 'correction' to Weather Service tweet contradicting Trump in 'Sharpiegate' incident, watchdog says  Mulvaney: Trump faces difficulty if 2020 election becomes 'referendum' on him MORE, and the others with direct knowledge of President Trump’s actions testify in the Senate trial."

Bolton's lawyer confirmed the authenticity of the Times's report in a tweet, writing that he regretted that excerpts had been leaked during the classification and review process.

Bolton left the White House last year, with the president and his former aide disagreeing publicly at the time over whether he had been fired or resigned. The claim in his upcoming book revealed Sunday directly contradicts statements from Trump and other administration officials who have denied that aid to Ukraine was ever tied to the president's efforts to convince Ukraine's president to open investigations.