A slate of Democratic presidential candidates rallied with striking casino workers in Las Vegas on Wednesday as they work to attract support from labor groups ahead of the evening's primary debate and the Nevada caucuses on Saturday.

Former Vice President Joe Biden Joe BidenSenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies Biden says Ginsburg successor should be picked by candidate who wins on Nov. 3 MORE, former South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBipartisan praise pours in after Ginsburg's death Bogeymen of the far left deserve a place in any Biden administration Overnight Defense: Woodward book causes new firestorm | Book says Trump lashed out at generals, told Woodward about secret weapons system | US withdrawing thousands of troops from Iraq MORE, businessman Tom Steyer Tom SteyerTV ads favored Biden 2-1 in past month Inslee calls Biden climate plan 'perfect for the moment' OVERNIGHT ENERGY: Trump administration finalizes plan to open up Alaska wildlife refuge to drilling | California finalizes fuel efficiency deal with five automakers, undercutting Trump | Democrats use vulnerable GOP senators to get rare win on environment MORE and Sens. Amy Klobuchar Amy KlobucharThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill EPA delivers win for ethanol industry angered by waivers to refiners It's time for newspapers to stop endorsing presidential candidates MORE (D-Minn.) and Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (D-Mass.) were all seen protesting with the workers, who are demanding a new contract at Palms Casino Resort.

Warren swarmed as she arrives with doughnuts for the Culinary 226 picket line outside The Palms pic.twitter.com/4eMPyu3pd0 — Jonathan Easley (@JonEasley) February 19, 2020

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✅ Just hours before the Democratic Presidential Debate candidates show they stand with labor as they pick in front of @Palms this morning.



Hundreds gathered in solidarity for station casinoworkers fighting for a #ContractNow! pic.twitter.com/8lxU2650C4 — The Culinary Union (@Culinary226) February 19, 2020

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“Proud to stand with the cooks, servers, bartenders, and housekeepers of @Culinary226 as they stand up for their right to organize,” Buttigieg tweeted after his appearance at the protest.

Proud to stand with the cooks, servers, bartenders, and housekeepers of @Culinary226 as they stand up for their right to organize. It's time for @Palms and others to follow the law. https://t.co/49RwmEe5HL — Pete Buttigieg (@PeteButtigieg) February 19, 2020

The demonstration was organized by Nevada’s powerful Culinary Workers Union, which holds significant sway in the Silver State. The group raised eyebrows after it squared off with supporters of Sen. Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE (I-Vt.) over his “Medicare for All” plan and later declined to endorse a 2020 candidate.

The Democratic White House hopefuls have scrambled for labor support throughout the campaign, seeking to win over working class voters who historically vote Democrat but defected to President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE in 2016.

The Saturday Nevada caucuses will be the first real test of candidates’ support among Hispanic voters, who could account for up to one-fifth of the primary electorate in the state.

Polls there show Sanders and Biden locked in contention for the top spot, with Warren trailing in third and Steyer making a push to break into the top tier.