KEY POINTS
  • The battle over whether former national security advisor John Bolton will testify in President Trump's impeachment trial — and what he might say — grew fiercer.
  • The White House released a letter to Bolton's lawyer, claiming his upcoming memoir contains "significant amounts of classified information."
  • House Foreign Affairs Committee Chairman Eliot Engel revealed for the first time that Bolton told Engel last year that he suspected foul play in the abrupt removal of Marie Yovanovitch, U.S. ambassador to Ukraine, from her post..
Then-US National Security Adviser John Bolton speaks during a media conference in Kiev. John Bolton arrived to Kiev to meet with the top Ukrainian officials.

WASHINGTON — While the fight over President Donald Trump's impeachment took a new turn Wednesday in the Senate, outside the chamber, the battle over whether former national security advisor John Bolton would testify — and what he might say if he did — heated up.

According to Bolton's upcoming memoir, "The Room Where It Happened," Trump told him in person last summer that he planned to withhold nearly $400 million in U.S. foreign aid to Ukraine until the country agreed to launch investigations into Trump's political rivals, most notably, former Vice President Joe Biden and his son Hunter.