Drafts of the book outline the potential testimony of the former national security adviser if he were called as a witness in the president’s impeachment trial. WASHINGTON — President Trump told his national security adviser in August that he wanted to continue freezing $391 million in security assistance to Ukraine until officials there helped with investigations into Democrats including the Bidens, according to an unpublished manuscript by the former adviser, John R. Bolton. NYT: Trump Tied Ukraine Aid to Demands for Inquiries, Bolton Book Says John Bolton Reportedly Recalls Trump Tying Ukraine Aid To Biden Investigation How can Republicans not vote for witnesses after this? By Maggie Haberman and Michael S. Schmidt. They are two of the Times best and most credible reporters.