John Bolton Is Summoned to Testify in Trump Impeachment Inquiry. Bolton, John R, Sullivan, John J (1959- ), Democratic Party, House of Representatives, Trump, Donald J, Trump-Ukraine Whistle-blower Complaint and Impeachment Inquiry, Foreign Aid, Yovanovitch, Marie L, Zelensky, Volodymyr, Giuliani, Rudolph W, Ukraine, United States International Relations