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cold, the heat is on in iowa where candidates are making their final pitches before caucus-goers head out in what will be the coldest voting day in iowa caucus history. and the wicked weather not just hitting iowa, it's slamming the upper midwest as we speak heading east. it's already knocked out power for more than a quarter million americans and delayed thousands of flights. more on that storm coming up. but first, to the candidates far from hunkering down. and in the case of one vivek ramaswamy, picking up a surprising late endorsement. he's here to tell us all about it. and that ...

She's been in the middle of this all week, not once complaining about the snow and the cold, a quality of hers that i do not admire. anyway, she's with us now. aishah, how are things over there? >> reporter: we are inside, so i'm really, really well. we're inside smitty's ors, one of the most popular place here in des moines where people are going to come in in just a few minutes and talk politics expect weather as well. this has been around since 1967. they've seen a lot of caucuses. this is going to be the coldest one ever, and i want the talk to my friend, owner ben smith. i want to ask you...