APTOPIX Election 2020 Joe Biden Democratic presidential candidate former Vice President Joe Biden speaks at the Nevada Black Legislative Caucus Black History Awards brunch Sunday, Feb. 16, 2020, in Las Vegas. (AP Photo/John Locher)Photo by: John Locher/AP Election 2020 Changing Nevada People walk near the Paris Las Vegas hotel casino, site of a Democratic presidential debate, Wednesday, Feb. 19, 2020, in Las Vegas. Nevada's first-in-the West presidential caucus puts the spotlight Saturday on a state that has swung increasingly blue over the last two decades. (AP Photo/John Locher)Photo by: John Locher/AP Election 2020 Warren Democratic presidential candidate Massachusetts senator Elizabeth Warren, center, makes a stop at a Las Vegas taco shop on Friday, Feb. 21, 2020, as her presidential campaign heads into caucus day in Nevada. (AP Photo/Yvonne Gonzalez)Photo by: Yvonne Gonzalez/AP Amy Klobuchar Democratic presidential candidate Sen. Amy Klobuchar speaks Friday night, Feb. 21, 2020, at a Boys & Girls Club gymnasium in Reno, Nev. She told voters headed to Nevada's first-in-the West presidential caucuses on Saturday that she's the best candidate for those who are tired of extremes and want someone who has a proven track record working with Republicans and independents as well as Democrats to help find common ground. (AP Photo/Scott Sonner).Photo by: Scott Sonner/AP Election 2020 Nevada Volunteers for various campaigns talk to voters as they enter a presidential caucus site at Mendive Middle School in Sparks, Nev., on Saturday, Feb. 22, 2020. (AP Photo/Scott Sonner)Photo by: Scott Sonner/AP Election 2020 Nevada Volunteers for various campaigns talk to voters as they enter a presidential caucus site at Mendive Middle School in Sparks, Nev., on Saturday, Feb. 22, 2020. (AP Photo/Scott Sonner)Photo by: Scott Sonner/AP Election 2020 Nevada Volunteers for various campaigns talk to voters as they enter a presidential caucus site at Mendive Middle School in Sparks, Nev., on Saturday, Feb. 22, 2020. (AP Photo/Scott Sonner)Photo by: Scott Sonner/AP Elizabeth Warren Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., visits a caucus location at Coronado High School in Henderson, Nev., Saturday, Feb. 22, 2020. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Election 2020 Nevada Caucus Caucus-goers gather at a caucus location at Coronado High School in Henderson, Nev., Saturday, Feb. 22, 2020. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Pete Buttigieg Democratic presidential candidate former South Bend, Ind., Mayor Pete Buttigieg visits a caucus site Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/John Locher)Photo by: John Locher/AP Pete Buttigieg Democratic presidential candidate former South Bend, Ind., Mayor Pete Buttigieg visits a caucus site Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/John Locher)Photo by: John Locher/AP Election 2020 Bernie Sanders Supporters of Democratic presidential candidate Sen. Bernie Sanders, I-Vt., cheer as they caucus at the Bellagio hotel-casino, Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/John Locher)Photo by: John Locher/AP Election 2020 Nevada Caucus People take pictures of the results at a Democratic presidential caucus site at the Bellagio hotel-casino Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/John Locher)Photo by: John Locher/AP Election 2020 Nevada Caucus Caucus-goers look over vote numbers at a caucus location at Coronado High School in Henderson, Nev., Saturday, Feb. 22, 2020. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Election 2020 Nevada Caucus Caucus-goers hold up their ballots, Presidential Preference Cards, at a caucus location at Coronado High School in Henderson, Nev., Saturday, Feb. 22, 2020. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Election 2020 Nevada Caucus Caucus-goers listen as a supporter of Democratic presidential candidate, former South Bend, Ind., Mayor Pete Buttigieg, right, speaks in support of him at a caucus location at Coronado High School in Henderson, Nev., Saturday, Feb. 22, 2020. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Election 2020 Nevada Caucus A supporter of Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., speaks in support of her at a caucus location at Coronado High School in Henderson, Nev., Saturday, Feb. 22, 2020. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Election 2020 Joe Biden A supporter of Democratic presidential candidate, former Vice President Joe Biden, left, speaks in support of him at a caucus location at Coronado High School in Henderson, Nev., Saturday, Feb. 22, 2020. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Election 2020 Nevada Caucus Caucus-goers listen to a precinct leader at a caucus location at Coronado High School in Henderson, Nev., Saturday, Feb. 22, 2020. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Ryan Koppelman Ryan Koppelman, a precinct captain for Democratic presidential candidate former South Bend, Ind., Mayor Pete Buttigieg, speaks with a caucus-goer at a caucus location at Coronado High School in Henderson, Nev., Saturday, Feb. 22, 2020. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Election 2020 Nevada Caucus Caucus-goers gather at a caucus location at Coronado High School in Henderson, Nev., Saturday, Feb. 22, 2020. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Election 2020 Nevada Caucus A precinct leader, right, counts votes at a caucus location at Coronado High School in Henderson, Nev., Saturday, Feb. 22, 2020. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Elizabeth Warren Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., greets caucus-goers at Coronado High School in Henderson, Nev., Saturday, Feb. 22, 2020. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Joe Biden Democratic presidential candidate former Vice President Joe Biden pauses as he speaks during a caucus night event, Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/John Locher)Photo by: John Locher/AP Election 2020 Joe Biden A woman cries as she watches Democratic presidential candidate former Vice President Joe Biden speak during a caucus night event Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/John Locher)Photo by: John Locher/AP Joe Biden Democratic presidential candidate former Vice President Joe Biden takes a selfie with supporters during a caucus night event Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/John Locher)Photo by: John Locher/AP Joe Biden, Finnegan Biden, Jill Biden Democratic presidential candidate former Vice President Joe Biden, joined by his wife Jill Biden, right, and granddaughter Finnegan Biden, second from right, speaks during a caucus night event Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/John Locher)Photo by: John Locher/AP Election 2020 Joe Biden A woman cries as Democratic presidential candidate former Vice President Joe Biden speaks during a caucus night event, Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/John Locher)Photo by: John Locher/AP Pete Buttigieg Democratic presidential candidate, former South Bend, Ind., Mayor Pete Buttigieg speaks at a caucus night event, Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Joe Biden Democratic presidential candidate former Vice President Joe Biden speaks during a caucus night event, Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/John Locher)Photo by: John Locher/AP Pete Buttigieg, Chasten Buttigieg Democratic presidential candidate, former South Bend, Ind., Mayor Pete Buttigieg hugs his husband Chasten Buttigieg after speaking at a caucus night event, Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Pete Buttigieg Democratic presidential candidate, former South Bend, Ind., Mayor Pete Buttigieg speaks at a caucus night event, Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP Pete Buttigieg, Chasten Buttigieg Democratic presidential candidate, former South Bend, Ind., Mayor Pete Buttigieg, left, and his husband Chasten Buttigieg acknowledge supporters after speaking at a caucus night event, Saturday, Feb. 22, 2020, in Las Vegas. (AP Photo/Patrick Semansky)Photo by: Patrick Semansky/AP