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we begin with the breaking news on the january 6th investigation. sources now telling cnn that one of the highest ranking former trump officials is now cooperating with the select committee. let s go straight to cnn s special correspondent jamie gangel who has exclusive reporting for us. tell our viewers what you re learning? cnn is learning that mark short, one of former vice president mike pence s closest advisers and former chief of staff is cooperating with the january 6th committee. we learned the committee subpoenaed mark short a few weeks ago, but unlike some other trump officials, he is not fighting the subpoena rmt short s cooperation, wolf, is a significant development because he is a firsthand witness to many critical events. he was with mike pence at the capitol on january 6th. he was also in the oval office on january 4th when former president trump tried to convince pence not to certify the election results. in addition, wolf, our sources say that short ....
a live report from london s airport just ahead. the biden administration is expected to announce a diplomatic boycott of the beijing olympics. we ll tell you how china is reacting to the news. ash and destruction in indonesia displaces hundreds of people. officials say the volcano is still dangerous. announcer: live from cnn center, this is cnn newsroom with rosemary church. it is monday, december 6th and we begin with the omicron variant. right now new covid testing requirements are in effect for all travelers coming to the united states. so here s what you need to know. there are omicron cases in at least 16 states including california and new york. now all travelers boarding a flight to the u.s. must have proof of a negative covid test one day before takeoff. plus, foreign nationals must be fully vaccinated to enter the country and a mask mandate remains in place for all airports, planes, and public transportation. though the new variant is causing alarm wo ....
over ukraine, a critical phone call is about to happen between president biden and vladimir putin. can the u.s. president get putin to stand down? welcome to the lead. i m dana bash in for jake tapper. we begin with the health lead and the sweeping new vaccine requirement for nearly everyone who works in new york city. today mayor bill de blasio announced all private sector employers will be required to implement a vaccine mandate by the end of this month. just as covid cases, hospitalizations and deaths are at their highest levels nationwide in six weeks. so far 17 states have identified cases of the omicron variant and while more cases are expected, delta remains the dominant strain by far in the u.s. as jason carroll reports, dr. anthony fauci says there are encouraging signs that omicron may not be as severe as first feared. reporter: new york city s mayor has made it official. anyone working in the city will be subject to a vaccine mandate. the mayor announci ....
launching an invasion of ukraine. the president has a video call scheduled tomorrow and announcing a diplomatic boycott of the upcoming olympics in beijing. no u.s. government officials will attend. but u.s. athletes will still be able to compete. phil mattingly joins us now. a lot of high stakes international issues right now. reporter: no question about it. jen psaki just publicly announcing that diplomatic boycott, a short while ago and addressing a series of questions about the looming phone call with russian president vladimir putin. and make no mistake about it, u.s. officials have grown concerned over the course of the last several weeks due to a build up of russian troops on the ukrainian boarder that could reach 175,000. a lot of the question right now inside of the administration is what is president putin s intend. that is a driving factor behind the decision to schedule that video call tomorrow. and i think what is going on as well as trying to figure ou ....
rules that are now taking effect? and an expansion of new york city s vaccine mandate. and the trump-fueled split in the republican party is worsening in georgia. an ousted u.s. senator and ally of the former president is now running against the top trump target. the state s gop governor. we want to welcome our viewers here in the united states and around the world. i m wolf blitzer. you re in the situation room. let s go straight to the white house and our chief national affairs correspondent jeff zeleny who is joining us right now. president biden is facing very significant new tests with both russia and china. and there are now new developments unfolding on both fronts. update our viewers. the white house is announcing a boycott of the 2022 winter olympic games in beijing. not for athletes but for u.s. diplomats. they are simply not sending a delegation to beijing next year, calling out human rights abuses. this is coming on the eve of a critical phone call bet ....