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. Democrats Demand Bolton Testify at Trump's Impeachment Trial Associated Press WASHINGTON - The stakes over witness testimony at President Donald Trump's impeachment trial are rising now that a draft of a book from former national security adviser John Bolton appears to undercut a key defense argument. Bolton writes in the forthcoming book that Trump told him that he wanted to withhold hundreds of millions of dollars in security aid from Ukraine until it helped him with politically charged investigations, including into Democratic rival Joe Biden. Trump's legal team has repeatedly insisted that the Republican president never tied the suspension of military assistance to the country to investigations that he wanted into Biden and his son. The account immediately gave Democrats new fuel in their pursuit of sworn testimony from Bolton and other witnesses, a question expected to be taken up later this week by the Republican-led Senate. The trial resumes Monday afternoon with arguments from Trump's defense team. Bolton's account was first reported by The New York Times and was confirmed to The Associated Press by a person familiar with the manuscript on the condition of anonymity to discuss the book, "The Room Where It Happened; A White House Memoir," ahead of its release March 17. References Visible links Hidden links: 1. file://localhost/usa/trump-impeachment/bolton-book-says-trump-held-ukraine-aid-biden-investigation .