good-bye, america. making an emergency landing. >>> good evening, as we come on the air tonight, the candidates are all over this state. 24 hours before the iowa ucuses. close to predict. hillary clinton with a slight lead over sanders. but his crowds large and fired up re. we start with a new poll on the republican side, showing trump taking the lead back from ted cruz. marco rubio in third. trump fighting to close the deal after skipping the final debate before iowa. ted cruz, making news because of a continueroversial voter mailing. here's jon karl. >> reporter: tonight in iowa, trump and his family trying to close their biggest deal of all. >> he will be unbelievable. the best deal maker, the best master negotiator. >> reporter: shaking hands, signing autographs, holding babies. an all-out push to turn poll numbers into real votes. 104 temperature, you can't leave. you will not be able to make it. get out of bed and caucus. >> reporter: the man that wants to win iowa, his wife by...