Saturday's caucuses followed a fiery debate among the candidates earlier in the week in which Sanders, Joe Biden and Elizabeth Warren challenged former New York City Mayor Mike Bloomberg on sexism and race and Amy Klobuchar sparred with Pete Buttigieg over their political experience.
Read the latest updates:
- Sanders touts 'multi-generational and multi-racial coalition' in victory speech; read NBC News' analysis of his win.
- Buttigieg rips Sanders, while Biden declares a comeback.
- Warren says she's in the race "to make change"; Klobuchar and Steyer sound optimistic notes in remarks to supporters.
- Hotline jams caused some reporting delays, and some caucus sites faced volunteer shortages.
- Track the number of delegates each candidate has won so far.
- Click here for the state-by-state primary results and here for the Nevada results as they start coming in.
Download the NBC News app for full coverage and alerts on the latest news.
After Nevada loss, Buttigieg says he's hoping for a diverse coalition in South Carolina
Speaking with reporters on the flight from Nevada to Colorado following his caucus speech, Buttigieg emphasized the need to do well in the upcoming nominating contests.
"Obviously South Carolina’s an opportunity to demonstrate that our coalition is broader than people thought, as I believe is happening in Nevada," he said. "We’ve got to have a good showing in Super Tuesday, it’s why we’re pushing so hard to make sure we have the resources to win."
Asked about the ads his campaign has started running in South Carolina, hitting Sanders on healthcare, Buttigieg said, "He’s the frontrunner right now, and we need to make sure that we challenge his vision because I think it’s a vision that most Democrats and certainly most Americans don’t share."
Polls show that a majority of Democratic voters in Iowa, New Hampshire and Nevada are in favor of Medicare for All, Sanders' signature policy proposal. The Vermont senator won New Hampshire and Nevada and was a close runner-up in Iowa.
Steyer leaves Nevada on an optimistic note
Tom Steyer sounded an optimistic note about his less-than-top-tier finish in Nevada on Saturday night, telling supporters in remarks that lasted only a few minutes that he was "really, really proud" of how he was doing as results trickled in and "really thrilled" about what his campaign had accomplished.
The billionaire activist said he believed “more strongly than ever in what we are fighting for” and that he can see “why we are the answer to the Democratic question of who can beat Trump.”
Although results were still coming in, Steyer said he thought he was "going to have a good night" and "this is the start of us moving up.” He added, “I think what we are going to see is, as we get into diverse America, we do better and better and better” and predicted a strong performance next Saturday in South Carolina.
“Tonight is the start, next Saturday is the next step, and then Super Tuesday is when we prove it,” Steyer said before telling the crowd that he was catching an overnight flight to South Carolina and to “have fun tonight."
"So let's get ready for that," he said about the upcoming contest. "Let's take credit for what happened, and then let's build on it and keep going."
Warren congratulates Sanders, reassures supporters ‘we have a lot of states to go’
Elizabeth Warren congratulated Bernie Sanders on his Nevada victory during a campaign rally in Seattle on Saturday evening.
"Thank you Nevada for keeping me in the fight. The results have come in Bernie won," Warren said. "Congratulations, Bernie."
Despite her cordial opening, Warren did not shy away from criticizing the night's big winner.
"Bernie says we're going to keep the filibuster. I say Mitch McConnell is not going to get a veto over what we do," Warren said. "I am not in this fight to talk about change. I am in this fight to make change."
Warren, who has underperformed in early nominating contests, reassured her supporters that the race was not yet a done deal.
“Since Wednesday night, our support has been growing everywhere,” she said, highlighting the $9 million her campaign has raised since her strong Las Vegas debate performance earlier this week.
“We have a lot of states to go, and right now I can feel the momentum,” Warren said.
ANALYSIS: It's not just bros —Sanders' electorate reflects a cross-section of the party
LAS VEGAS — Put "Bernie Bros" on the back-burner.
It's the army of sobrinos and sobrinas — the Spanish words for nephews and nieces — who should strike fear in the hearts of Bernie Sanders' rivals for the Democratic presidential nomination and party elites after he ran up the score among Latino voters in the Nevada caucuses Saturday. Rep. Alexandria Ocasio-Cortez, D-N.Y., and other Latinx backers of Sanders refer to him fondly as their "tío," or uncle.
Sanders was the choice of 54 percent of Hispanic caucus-goers Saturday on his way to steamrolling to the most convincing victory of the primary season, according to an NBC entrance poll. His closest competitor, former Vice President Joe Biden, racked up 14 percent, with no other candidate cracking double digits.
Those results signaled that the energy Sanders has poured into building a more diverse coalition than his failed 2016 campaign is paying off at just the right time. He can now stake the first claim — less than two weeks before the "Super Tuesday" contests in 14 states — to having won a state where white, Hispanic and black voters are all represented in substantial numbers.
Read the full analysis here.
Hotline jams responsible for some reporting delays
Multiple Nevada caucus precinct chairs told NBC News that they had to wait anywhere from 20 minutes to 2 hours to phone in their site results due to jammed hotlines Saturday.
“It just beeped the whole time,” said Ashlyne Rose, a 20-year-old nursing student and precinct chair.
Two chairs interviewed by NBC News said that the Nevada Democratic Party had texted them Saturday afternoon to provide the phone number they were supposed to use to report results. But when the time came, several chairs tried repeatedly to get through and were initially unable to do so.
Around 5 p.m. ET, or 2 p.m. local time, the party sent a second text message with three additional phone numbers to call. “Thanks so much for your hard work. If you haven’t reported yet, you can call any of the following numbers to do so,” the message read. “If you don’t reach us right away, we’ll give you a call back to take your results.”
Calling those numbers resulted in being placed on hold for up to 20 minutes for some chairs, but the chairs said they were eventually able to report their results.
During the Iowa caucuses on two weeks ago, results were delayed for hours as an app coding issue and overwhelmed phone lines bogged down reporting. There was no evidence of any issue on a similar magnitude in Nevada and caucus managers said they weren’t overly concerned.
"I wasn’t really worried, I just thought I would call in a bit after calls went through," Rose said.
Gary Reese, a 65-year-old government worker, arrived a precinct in Elko County as an observer and was quickly pressed into service as a precinct chair due to a shortage of volunteers.
"First time I called I got a disconnected tone, like the line is not in service," Reese said.
Eventually he was told to go home and keep trying from there. He never received the secondary list of phone numbers because he was a day-of volunteer and neither the site lead nor the Democratic Party had his information. Around 7:15 p.m. ET, or 4:15 p.m. local time, he was able to submit his results via the original phone number.
Not everyone had to wait, however. Another precinct chair told NBC News they were able to report in results without issue on the original phone number.
Molly Forgey, the Nevada Democratic Party spokesperson, told NBC News in an email that the party had prepared "all along for a high influx of results as caucuses wrap up, and we’re working diligently to accommodate and continue processing the high volume of incoming results from precinct chairs."
Bloomberg campaign: Nominating Sanders would be 'a fatal error' for Democrats
Mike Bloomberg's campaign manager, Kevin Sheekey, blasted Bernie Sanders following the results of the Nevada caucuses, saying that nominating the Vermont senator would be a "fatal error" for Democrats.
"The Nevada results reinforce the reality that this fragmented field is putting Bernie Sanders on pace to amass an insurmountable delegate lead," Sheekey said. "This is a candidate who just declared war on the so-called 'Democratic establishment.'"
"We are going to need Independents AND Republicans to defeat Trump — attacking your own party is no way to get started," Sheekey said. "As Mike says, if we choose a candidate who appeals to a small base — like Senator Sanders — it will be a fatal error."
Graphic: See which candidates increased their support from the first round of the caucuses to the second
Unlike in primary elections, higher-tier candidates can pick up extra support during the Nevada caucuses. This is because candidates that do not have support from at least 15 percent of caucus-goers in the first alignment are eliminated.
Here’s a look at the support levels each candidate received during the alignments. Note that the percent reported displayed here represents the number of precincts that have reported its initial and reallocated numbers.
This chart will update as more results come in. See the full results on NBC News' Nevada election results page.
Sanders' Nevada win cheered by Latinos
Valeria Romano said she could see a difference when she was knocking on Latinos' doors for Bernie Sanders in this election compared to 2016. People were more responsive, paying attention, and many were in agreement with her support for Sanders.
"I did’t think it was going to happen, that we were going to have this kind of lead," Romano told NBC News.
"It proves to me that the last election wasn’t in vain," she said. "It was just the beginning. Now we’re seeing how it's going to turn out and people are going to pay attention now. Bernie has woken up so many minds and that gives me hope especially for the future."
Romano, 32, is a mother of two with another child on the way, and she works one job at a retail art supply store and a second job selling her screen printings. Yet she increased her work on Sanders' behalf for this campaign to help get more Latinos to vote for him and increase the community's influence in picking a presidential nominee.
In 2016, people in the community knew Sanders only as "el hombre con el pelo (the man with the hair)," she said after NBC News projected Sanders as the caucus winner. "People really knew him this time. He was Tío (uncle) Bernie or El Quemazon (the burn), a moniker that became a corrido or ballad.
Sanders' campaign was on the ground early and has integrated outreach to Latino voters throughout the campaign, said Chuck Rocha, Sanders' campaign adviser. The campaign has spent millions to reach new Latino voters and those that have not voted often. It hired 200 staff in Nevada, about a third of whom are Latino, almost all of them bilingual, Rocha said.
Rocha said he'd been consistently targeting 100,000 Latinos — over 50,000 more than those who caucused in the last election or who regularly vote. Sanders' finish in Nevada shows that "early intentional investments can deliver the Latino vote," he said.
"We won the Nevada caucus by historic margins by incorporating Latinos into leadership and every part of the campaign," he said.
"Every time I'm with him (Sanders), he turns to me and says, 'Chuck, tell me what we are doing to get the Latinos out,'" he said.
Showing his intention to keep trying to rally Latinos, Sanders gave his victory speech in San Antonio, Texas, a heavily Latino city and home of former presidential candidate Julián Castro.
Sanders celebrates Nevada victory, touts 'multi-generational and multi-racial coalition'
Bernie Sanders celebrated his decisive victory in the Nevada caucuses on Saturday, introducing his wife Jane Sanders to an energized crowd in San Antonio, Texas, as “the next first lady.”
“Let me introduce to you the next first lady,” Sanders said, as he took the stage to a cheering crowd of supporters. “You will be very proud of her as first lady.”
“Let me thank the people of Nevada for their support," Sanders continued, touting a "multi-generational and multi-racial coalition" that not only delivered a victory to him tonight, but “is going to sweep this country.”
Sanders was in Texas campaigning ahead of the Lone Star State's primary on Super Tuesday, March 3.
“Don't tell anybody I don't want to get them nervous,” Sanders said. “We are going to win the Democratic nomination in Texas.”
Sander poked fun at President Donald Trump, who had been tweeting about the Vermont senator as caucus results rolled in.
“The president gets very, very upset easily so don't tell him we are going to beat him here in Texas,” Sanders said.