Laura Moser, despite an attack from her own party, made it through the first round of a Texas primary on Tuesday, winning a place in a runoff against Lizzie Pannill Fletcher, an EMILY’s List-backed candidate.

Moser, in the May runoff in the state’s 7th Congressional District, will have the support of organized labor, which stridently opposes Fletcher, a partner in a law firm that represents employers and has played a significant role in targeting unions in the state. During the primary, the state AFL-CIO voted to anti-endorse Fletcher, meaning members were urged to vote for anyone but her. With just one candidate now running against Fletcher, Moser’s endorsement is all but assured. “The Texas AFL will have to formally endorse her, but it is a given,” said one high-ranking union official.

“Lizzie Fletcher’s law firm, and Lizzie herself as a partner, profited from the pain and loss of immigrant women janitors,” Joe Dinkin, a spokesperson for the Working Families Party, told The Intercept after the results were called. “That’s not right. If Democrats are going to win in November, we need candidates who fight for working families, not fight against them.”

Dinkin said the WFP would be spending money against Fletcher in the runoff, as it did already.

Fletcher finished first, with 31 percent of the vote, with Moser edging out progressive cancer researcher Jason Westin with 22 percent to his 20 percent. Had the Democratic Congressional Campaign Committee spent money to boost Westin’s campaign instead of going negative against Moser, Westin may have moved forward into the runoff. Indeed, had the DCCC done nothing at all, Westin may have survived — The Intercept noted on the morning of the party committee’s intervention that he was surging in the final weeks of the campaign, as his progressive platform, impressive medical credentials, and endorsement by the Houston Chronicle combined to give him a last-minute boost.

Voter-turnout expert Ben Tribbett argued that the DCCC pushed Moser over the top.