John R. Bolton, former United States National Security Advisor.
ERIC TUCKER, ZEKE MILLER and LISA MASCARO
Associated Press
WASHINGTON (AP) — Pressure is increasing on senators to call John Bolton to testify at President Donald Trump's impeachment trial after the revelation that a draft of a book by the former national security adviser undercuts a key defense argument — that Trump never tied withholding military aid to Ukraine to his demand the country help investigate political rival Joe Biden.
Bolton writes in the forthcoming book that Trump told him he wanted to withhold hundreds of millions of dollars in security aid from Ukraine until it helped him with investigations into Biden. Trump's legal team has repeatedly insisted otherwise, and Trump tweeted on Monday that he never told Bolton such a thing.
Republican senators faced a pivotal mome
