Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Trump Impeachment Trial Nears End as Senate Debates New Witness Testimony VOA News The U.S. Senate is set to vote Friday on whether to allow new testimony and documents in President Donald Trump's impeachment trial as reports of new revelations surface from Trump's former national security adviser, John Bolton. The Republican-majority Senate is widely anticipated to acquit Trump after rejecting Democratic calls for new evidence. The precise timetable for final action was unclear as the Senate began four hours of debate between House managers and Trump's lawyers over whether to call witnesses, including Bolton. Watch the Senate trial live: New Bolton revelation The New York Times reported Friday that a manuscript of Bolton's unpublished book says that Trump directed him to participate in the Republican president's pressure campaign to get Ukrainian officials to obtain harmful information on Democrats, including former Vice President Joe Biden and Biden's son, Hunter. Bolton's manuscript reportedly says Trump issued the directive during an Oval Office discussion that included acting White House chief-of-staff Mick Mulvaney, Trump's personal lawyer Rudy Giuliani and White House counsel Pat Cipollone -- who is participating in the impeachment trial. Bolton wrote that the White House conversation occurred in early May, more than two months before Trump asked Ukrainian President Volodymyr Zelenskiy to publicly announce an investigation of Biden, a political rival Trump could potentially face in the 2020 presidential election. .