JARRETT: Well, just one week from today the Iowa caucuses start the process of deciding which Democrat will challenge President Trump. Three top Democrats getting big endorsements this weekend. In Iowa the Des Moines register endorsed Senator Elizabeth Warren. The Sioux City journal threw its support behind former Vice President Joe Biden. In New Hampshire the union leader, the biggest newspaper came out for Senator Amy Klobuchar, but the candidate making the most noise as the first vote approaches is Senator Bernie Sanders. CNN's Jeff Zeleny on the trail with Sanders in Iowa.</s>JEFF ZELENY, CNN SENIOR WASHINGTON CORRESPONDENT: Laura and Alison, one week now until the Iowa caucuses. Senator Bernie Sanders and other senators heading back to Washington for the impeachment trial not without though a weekend of campaigning behind them. Senator Sanders clearly surge in, you can tell, because his rival Democratic candidates are beginning to take him on and urging voters to question his electability. Senator Sanders at the last stop of his Sunday night campaign here in Sioux City had this to say about that.</s>SEN. BERNIE SANDERS, (I-VT), U.S. PRESIDENTIAL CANDIDATE: You can tell how good I feel by how nervous the establishment is getting.</s>ZELENY: So Senator Sanders will be spending the rest of the week in Washington as will Amy Klobuchar and Elizabeth Warren. That leaves the state of Iowa to Pete Buttigieg, Joe Biden and even Andrew Yang. The question here, which organization will keep working and turn out those caucus goers one week from tonight? Bernie Sanders says if he wins here, he thinks he can win the nomination. Laura and Alison?</s>JARRETT: All right, Jeff Zeleny, thanks so much.</s>KOSIK: It's a shocker around the world, Kobe Bryant dead at 41 in a helicopter crash. What we know about the investigation, an emotional tribute including at the Grammy Awards.</s>UNIDENTIFIED FEMALE: We love you, Kobe. Boy's II Men.
America's Choice In 2020, Last Minute Push In Iowa.