The Situation Room With Wolf Blitzer

Schumer: "Newly-revealed emails are a devastating blow to McConnell's push to have trial without documents & witnesses"; Pelosi: "Trump engaged in unprecedented, total obstruction of Congress, hiding these emails, all other documents"; Schiff calls new documents "deeply incriminating"; McConnell expected to speak from Senate floor tomorrow, may shed light on impeachment trial; Sources: White House aides have been in touch with McConnell's office during holiday break plotting steps to force Pelosi's hand; Pentagon warns anyone attempting to overrun U.S. Embassy in Baghdad "will run into a buzz saw"; Trump praises Kim amid new North Korean threats; New video of attack on U.S. Embassy in Baghdad; Pelosi responds to new Ukraine documents: "Why won't Trump & McConnell allow fair trial?"; Sanders and Buttigieg raise more money than Biden in final quarter of 2019; Biden: Trump will do everything he can to "bait me"; Julian Castro