Last week, workers at the Donald Trump co-owned Trump International Hotel Las Vegas voted yes to unionizing, despite a harsh anti-union campaign from management. Given that anti-union campaign before the vote, it’s not surprising that management hasn’t changed its tune since the vote, and is trying to get the results thrown out:

Just 24 hours before billionaire frontrunner Donald Trump took the stage for the fifth GOP debate, the Trump International Hotel in Las Vegas launched a legal challenge to its 500-odd workers’ effort to form a union. After a year of organizing, much of it in secret, a narrow majority of the workers voted earlier this month to join the Culinary Workers Union and Bartenders Union, which are part of the national hospitality workers union Unite Here. The text of the company’s complaint — filed with the National Labor Relations Board in D.C. — is not yet public, and multiple calls to the hotel’s management were not returned by the time of publication. But Trump hotel workers told ThinkProgress that their company is “objecting to the outcome of the vote and want it thrown out.”

The stakes for the workers are high. A union representative told ThinkProgress that “The Trump Hotel Las Vegas workers are paid approximately $3.33 less per hour across classifications compared to the workers all around them who do the same work at [union hotels such as] the Wynn, Treasure Island, The Mirage, MGM, etc.” But it’s their livelihoods and union rights against some billionaires’ desire for a little extra profit, so it’s going to be a fight.