Presidential candidates begin final push ahead of Nevada Caucus

From left, Democratic presidential candidates former South Bend Mayor Pete Buttigieg, Sen. Bernie Sanders, I-Vt., former Vice President Joe Biden, Sen. Elizabeth Warren, D-Mass., and Sen. Amy Klobuchar, D-Minn., stand on stage Friday, Feb. 7, 2020, before the start of a Democratic presidential primary debate hosted by ABC News, Apple News, and WMUR-TV at Saint Anselm College in Manchester, N.H. (AP Photo/Elise Amendola)