Nevada Democratic caucuses

The crowd shows its support during Bernie Sanders’ speech conceding defeat in the Nevada Democratic caucuses to Hillary Clinton at the Henderson Pavilion in Henderson, Nev.

Hillary Clinton speaks at a victory rally at Caesars Palace in Las Vegas after the Democratic caucuses Saturday.

Sen. Bernie Sanders (I-Vt.) gives a concession speech at the Henderson Pavilion in Henderson, Nev., after Saturday’s Democratic caucuses.

Former President Bill Clinton hugs his wife, Democratic presidential candidate Hillary Clinton, at a victory rally at Caesars Palace in Las Vegas after Saturday’s Democratic caucuses.

Sen. Bernie Sanders (I-Vt.) speaks to supporters in Henderson, Nev., after losing the Nevada Democratic caucuses on Saturday.

Democratic presidential candidate Sen. Bernie Sanders gets a hug from a supporter at a Nevada caucus watch party in Henderson, Nev., on Saturday, Feb. 20, 2016.

Democratic presidential candidate Hillary Clinton greets supporters during a caucus day event at Caesers Palace on Feb. 20, 2016 in Las Vegas, Nevada.

Voters line up to participate in Nevada’s Democratic caucuses at the University of Nevada in Reno on Feb. 20, 2016.

Bernie Sanders supporter Liliana Aguirre sings the praises of her candidate while waiting in a long line to caucus at Rancho High School in Las Vegas on Feb. 20, 2016.

Jim Eads waits in line to caucus at Rancho High School in Las Vegas on Feb. 20, 2016.

Supporters rally in Las Vegas on Feb. 19 for Democratic presidential candidate Hillary Clinton.

Sen. Bernie Sanders pauses for photos with employees as he and his wife Jane, right, visit the MGM Grand hotel and casino in Las Vegas on Feb. 20, 2016, as the presidential caucuses got underway.

Democratic presidential candidate Sen. Bernie Sanders gets a hug from a worker at MGM Grand hotel and casino on Feb. 20, 2016, in Las Vegas.

Chelsea Clinton went door to door with volunteers in Las Vegas on Feb. 19, 2016, asking voters to support her mother, Hillary Clinton, in Saturday’s Democratic caucuses.