Nevada Voters Caucus for Democratic Candidates

People line up to participate in the Democratic caucus at the University of Nevada on Feb. 20, 2016, in Reno, Nev.

Precinct captain Hayley Hageman instructs people through a bullhorn at a Democratic caucus site at the University of Nevada on Feb. 20, 2016, in Reno, Nev.

Democratic presidential candidate Sen. Bernie Sanders, I-Vt., center, waves to voters as he leaves a caucus site, on Feb. 20, 2016, in Las Vegas.

Congressman Tony Cardenas, right, from California encourages Hillary Clinton caucus goers as they prepare to indicate their presidential candidate preference at Rancho High School in Las Vegas on Feb. 20, 2016.

Kara Bonham, at left, registers to vote for the Democratic caucus at the University of Nevada on Feb. 20, 2016, in Reno, Nev.

A precinct official counts votes in the Nevada Democratic Presidential candidates caucus at Rancho High School in Las Vegas on Feb. 20, 2016.

Democratic presidential candidate Hillary Clinton meets employees during a campaign stop on caucus day at Harrah's Las Vegas in Las Vegas on Feb. 20, 2016.

People shake hands holding placards in support of their respective Democratic candidate outside a caucus location at Caesars Palace in Las Vegas on Feb. 20, 2016.

Jim Eads waits in a long line to caucus for his presidential candidate preference at Rancho High School in Las Vegas on Feb. 20, 2016.

Hillary Clinton supporters handout t-shirts as caucus goers arrive to make their presidential candidate preference at Rancho High School in Las Vegas on Feb. 20, 2016.

Liliana Aguirre shouts her support for Bernie Sanders as she waits to caucus at Rancho High School in Las Vegas on Feb. 20, 2016.

Democratic presidential candidate Hillary Clinton reacts as employees of Harrah's Las Vegas surround her during a visit to the hotel and casino on the day of the Nevada Democratic caucus on Feb. 20, 2016, in Las Vegas.

Democratic presidential candidate Sen. Bernie Sanders greets workers in the cafeteria of the MGM Grand Casino on Feb. 20, 2016 in Las Vegas.

Supporters of Hillary Clinton and Bernie Sanders cheer on their presidential candidates before entering a caucus site during the Nevada Democratic caucus, on Feb. 20, 2016, in Las Vegas.