temperatures, negative 20 when i woke up this morning there's plenty of snow on the ground, some of the roads still impassable. so that is certainly an added dynamic in this caucus. back to you. >> eva mckend in des moines, thanks so much. despite polls that suggest otherwise, the biden campaign says that new internal data shows that some undecided voters are not yet convinced that the former president trump will be the republican nominee and that presents a new challenge as the team works to deliver a second term for president biden. >> cnn's camilla dee chalice is at the white house. tell us more about these voters, who they are and how they're influencing biden's reelection strategy. >> reporter: well, these voters are people who have decided that they're undecided, they haven't fully made up their minds whether they will put all of their support behind biden in the upcoming election cycle. now, the campaign team says that moving forward part of their