Democratic presidential candidate Martin O’Malley will make an appearance at the Trump International Hotel in Las Vegas to rally workers who are battling the Republican presidential front-runner in an attempt to unionize.

{mosads}The former Maryland governor will hold a press conference Wednesday outside Trump’s hotel with leaders of the Culinary Workers Union Local 226, workers at the Trump hotel, and other union activists and hospitality industry workers.

The union counts a large number of Hispanic workers as members and is an influential political force in Nevada, which has a high concentration of hotel, casino and restaurant workers.

On Friday, the protesters will march from Las Vegas Boulevard to the Trump hotel “to demand equality.” The union says about 500 workers at the Trump hotel want to join it.

“Donald Trump says he wants to make America great again,” Geoconda Arguello Kline, the secretary-treasurer for the union, said in a statement. “Mr. Trump should start right here in Las Vegas with workers at his hotel. Many of them are immigrants who work hard to provide for their families. They deserve equal treatment and should be respected for their contributions to this great city.”

O’Malley is on his first trip to Nevada as a presidential candidate. The Silver State will be the fourth contest in the Democratic nominating process, and the final in a group of carve-out states that includes Iowa, New Hampshire and South Carolina.

The former Maryland governor has struggled to gain traction in the race. He consistently polls at only 1 percent nationally and has been squeezed in the race by Sen. Bernie Sanders (I-Vt.), who has captured much of the energy on the left.

O’Malley is also scheduled to address the AFL-CIO, the nation’s largest federation of unions, on Wednesday at its annual convention in Nevada.

All of the Democratic candidates are angling for union endorsements.

Sanders landed the first major union endorsement last week when National Nurses United announced it would support his bid for the White House.