John Bolton Book Reportedly Claims President Trump Tied Ukraine Funds to Investigation

(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.