Culinary Workers Union Local 226, a Nevada union allied with Biden's campaign, dismissed the pledge.

"For decades, the Culinary Union has fought for tipped workers' rights and against unfair taxation," Ted Pappageorge, the union's secretary-treasurer, said in a statement.

"Relief is definitely needed for tip earners, but Nevada workers are smart enough to know the difference between real solutions and wild campaign promises from a convicted felon."