Pressure is increasing on senators to call John Bolton to testify at U.S. 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.
Ukraine-U.S. Relations
Associated Press: GOP defends Trump as Bolton book adds pressure for witnesses
A protester holds up a sign reading "impeach" outside the US Capitol building during the "People's Rally for Impeachment" on Capitol Hill in Washington, DC on Sept. 26, 2019.
