Although the Republican majority was nearly sure to acquit Trump, leaked excerpts of Bolton's book have reinforced the Democrats' accusations at the last minute, sending shockwaves through Washington. He writes that top officials such as acting Chief of Staff Mick Mulvaney, Rudolph W. Giuliani and White House Counsel Pat Cipollone - now leading the president's defense in the Senate - were present.
In a 51-49 vote, Senate Republicans on Friday evening succeeded in blocking new witnesses and documents from being considered in President Donald Trump's impeachment trial, paving the way for a likely speedy acquittal.
Former National Security Advisor John Bolton said Thursday that Trump administration officials who testified in the House impeachment investigation should be free to speak out without "retribution". The Trump administration has also sent Bolton's lawyers a letter saying it found classified information while reviewing the manuscript of Bolton's book.
Bolton, who is known for taking copious notes, reportedly wrote Trump's request was made in the presence of acting White House Chief of Staff Mick Mulvaney and Trump personal attorney Rudy Giuliani as well as White House Counsel Pat Cipollone, who is heading Trump's impeachment defense team.
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Beyond disrupting travel, the move is heightening concerns about the broader economic impact of the virus outbreak. Wuhan and most of the surrounding Hubei Province have been placed under lockdown .
"You may be a material witness to the charges against President Trump, even though you are also his advocate", they wrote.
Trump's defense in the impeachment scandal over his attempt to pressure Ukraine into helping him in the 2020 election is being led by Cipollone.
The White House did not immediately respond to a request for comment.
The discussion at the meeting in early May was first reported by The New York Times. The House of Representatives impeached Trump in December on two articles - abuse of power and obstruction of Congress.
Trump is accused of withholding $391 million in military aid to Ukraine in exchange for an investigation into former Vice President Joe Biden and Biden's son's involvement with the Ukraine energy company Burisma.