Democrats are trying to blunt the Republican advantage on the widely popular no-tax-on-tips policy as both parties look to strengthen their appeal to the working class ahead of the midterms.

The most intense of these battles is unfolding in Nevada, where five percent of workers earn tips, about double the national rate. Republicans are looking to flip three of the state’s four congressional districts — which include some regions where the tourism and gambling economy dominates. They have already spent millions on ads targeting Nevada Democrats for voting against the GOP megabill that included the tax deduction for tipped workers, which was pushed by President Donald Trump.

“Everyone knows that that was a massively influential message by the president,” said Robert Uithoven, a GOP strategist who is running the campaign of Lydia Dominguez, one of the Republicans vying for the party’s nomination to take on Rep. Susie Lee (D-Nev.). Uithoven noted that Trump won Lee’s district — which he said includes a large number of workers employed on the Vegas Strip — and carried the state.

Democrats, meanwhile, have blitzed through Las Vegas, Reno and the state’s other tourist hotspots, proclaiming that Republicans generated no such boon for tipped workers