crisis summit. sandered argued the high cost of his plan is the only option given the imminent threat of the planet. >> going on the green new deal, we have brought forth a rather detailed proposal, and i have been criticized by some who say it is expensive. well, they're right. it is. it's $16 trillion over a ten-year period. that's a lot of money, but i want you to tell me what the alternative is in terms of saving the planet. >> all right, still ahead, president trump's acting chief of staff mick mulvaney seeks to join a lawsuit concerning impeachment testimony. he is asking the court to decide whether he listens to his boss or complies with a subpoena. despite the president's claim he's bringing troops home from syria, the chairman of the joint chief of staffs says hundreds of troops will stay in the war-torn country, those