and kim's christmas gift. has north korea orders rocket engine tests and meets with top generals a source said the north koreans are about to unwrap a hard line approach to the u.s. i'm brianna keeler, wolf blitzer is off today. you're in "the situation room." we're following the political jockeying over president trump's upcoming impeachment trial. chuck schumer issuing a new demand for documents after the release of what schumer called explosive emails raising questions about the timing of president trump's freeze of aid to ukraine and his demand for political dirt on joe biden. also today republican leader mitch mcconnell said negotiations about the impeachment trial are at an impasse right now. but he won't rule out the possibility of calling witnesses. congressman dan kildee of michigan, a member of the house democratic leadership is standing by to take our questions and our constituents