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good evening. i'm norah o'donnell and thank you for being with us. tonight, winter storms blanket the nation. all 50 states under weather alerts today. the midwest is getting clobbered as a blizzard, heavy snow, and freezing temperatures cause havoc at the nation's airports, with more than 2,000 flights canceled. what the wild weather means for the nfl playoffs. also, there is bitter cold and whiteout conditions in iowa just as the 2024 election is heating up. at the final countdown for the kickoff of the race for the white house. cbs's ed o'keefe is there with how frigid weather is ...

good morning, everyone. we're going to take a minute to announce some good news. yesterday, clant collins is the new host of the 9:00 p.m. hour, opposite side of the day. >> i am. just when i got into this whole, you know, waking up at 3:30, everything. i had it down pat. >> i almost brought you a trash can and larmalarm clock. will you'll never have to set an alarm clock. >> it will be very exciting. f fun to i don't views and i will miss you. >> of course i'm going to miss you. you've been everything to me. >> i'm not far away. >> what is also great is the reporting you do every da...

game-changer. russian officials meanwhile warned western countries that they would ruin, rather run colossal risks if they supply ukraine with f-16s. but white house officials are saying they got assurances that ukraine will avoid potential escalations of the war. >> we have had multiple conversations with ukrainians about the risk of escalation here. nobody wants to see world war iii. and we have made it clear that we're not gonna encourage or ukraine to strike inside russian territory. so we've had that discussion with ukrainians, we have had it with respect to fighter aircraft. we...

governor intensifying and apparently costing the state thousands of jobs just days af before the republican is ex expecting to announce his campaign. welcome to our viewers in the united states and around the world. i'm wolf blitzer. you're in "the situation room." we begin with a new u.s. message about the war in ukraine. a significant development as president biden is out there on the world stage right now and in a potentially very pivotal moment in the conflict. phil mattingly is with the president at the summit in japan. kn nic robertson is in eastern ukraine. phil, as the pres...

spending pools, that move is gonna force desantis to file paperwork within the next 15 days. that's officially acknowledging his intentions to run for president for the first time. even though he hasn't officially announced yet, he has been acting like a presidential candid for several weeks. yesterday, travel to the early republican primary state of iowa. where he attended a pair of events and met with voters. super pac backing him had to santa's 2024 signs, merchandise available yesterday's event and during a speech, -- he turned his attention to the election. >> as bad as things a...