Texas Democrat James Talarico launched his general election campaign for the U.S. Senate Wednesday by framing his Republican opponent, state Attorney General Ken Paxton, as part of a corrupt political establishment that uses power to serve itself rather than the people.

Talarico has given Democrats their best chance in years of winning a Senate race in Texas and has boosted their still-uphill chances of retaking the majority in the U.S. Senate in November. Talarico, a former middle school teacher and a state lawmaker from Austin, laid out a clear strategy for the months ahead: Litigating Paxton’s scandals to a weary electorate.

“Ken Paxton is the most corrupt politician in America,” Talarico told a crowd of about 1,000 supporters who packed a dance club in downtown Houston. “He has failed the character test. He has put his own interests above the laws of Texas. Those are not my words, those are the words of Ken Paxton’s fellow Republicans.”

He also sought to tie what he called the “rot” at the heart of the nation’s political system to the everyday problems faced by many voters, driving home the concerns over rising costs that have been part of Democrats’ wider messaging strategy for this year’s midterm elections.

“In America, we have an affordability crisis because we have a corruption crisis,” Talarico told the crowd.