Trump, meanwhile, said on Monday that alleged details offered in the forthcoming book by Bolton, who was Trump's national security adviser until he departed late previous year, were false-namely, the alleged claim that Trump linked hundreds of millions of dollars to investigations in Ukraine.
But Bolton's testimony was only ever important, and never vital, precisely because so many people around him and so many documents supported the conclusion that President Trump had personally led the scheme to withhold military aid in exchange for Ukraine announcing investigations.
Under Senate Majority Leader Mitch McConnell's rules resolution passed at the beginning of the trial, debate and a vote over whether witnesses and other new evidence will be allowed in the trial will come after the defence team's arguments conclude and after Senators are given 16 hours to pose questions to both the prosecution and the defence.
The House impeached Trump on charges of abusing the powers of his office by asking Ukraine to investigate Biden and of obstructing a congressional inquiry into his conduct.
Those sentiments were echoed by Senate Minority Leader Chuck Schumer.
A draft manuscript of the forthcoming book was submitted to the National Security Council on December 30, 2019 for pre-publication review, he said. But there was no sign that four Republican Senators from a bench-strength of 53 would join 47 Democratic Senators to make that possible.
"They're asking you not only to overturn the results of the last election, but they're asking you to remove President Trump from the ballot in an election that's occurring in approximately nine months", Pat Cipollone told senators.
The Times also reports that Bolton wrote in the draft that acting White House Chief of Staff Mick Mulvaney was present during at least one phone call where Giuliani and Trump discussed Yovanovitch. "In fact, he never complained about this at the time of his very public termination".
On Monday, Amazon revealed that Bolton's account of his time in the White House will be published March 17 (hat tip to CNN'S Brian Stelter for noticing that).
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Under the trial's organizing resolution, the House managers will wrap up their 24 hours of presenting their case today. After that senators will face the question of whether they do, or do not, want to call witnesses to testify.
Schiff said Bolton - known to be a copious notetaker - should also provide documents.
The revelation put Senate Republicans in a tight spot. If Trump's critics argue that it's simply false to claim other politicians are just as corrupt, they can be written off as hopelessly naive or, worse, as partisans who lie for political gain.
In his August 2019 discussion with Bolton, the newspaper said Trump appeared focused on the theories Giuliani had shared with him and had replied to Bolton's question that he preferred sending no assistance to Ukraine until officials had turned over all materials they had about the investigation that related to Biden and supporters of Clinton in Ukraine.
A Democratic aide working on the Senate impeachment trial told CQ Roll Call that Trump's tweet is false. "Ambassador Bolton essentially confirms the president committed the offenses charged in the first article of impeachment".
Democrats quickly highlighted the Times report to bolster their calls for Bolton to testify.
The president rejected Bolton's reported account in a series of early Monday tweets.
Sen. Lindsey Graham told reporters on Monday he wanted to see Bolton's manuscript. Mr. Trump's team has maintained that the holdup in aid was separate from his requests for an investigation into the Bidens.
Before any vote on witnesses, Trump's legal team was to make its case in depth on Monday, turning to several high-profile attorneys to argue against impeachment. Now it's in the Senate GOP's hands, and you can bet it's a tougher call now.
The sheer depth of Bolton's resumé threatens some Republicans' efforts to dismiss the longtime conservative official and Trump national security adviser the same way they brushed off minor characters in the Ukraine saga.