It’s an evolution of an increasingly popular strategy among Democrats: turning legislative inaction to their advantage by casting themselves as the “50th vote” for programs or the filibuster changes needed to pass President Biden’s agenda.

Former Rep. Abby Finkenauer, a Democrat running to challenge Sen. Chuck Grassley (R-Iowa) in November, called Sinema a “sellout” in a video posted to Twitter on Thursday.

“[Sinema] is there for what reason I don’t know, but refuses to actually do anything that works for working families,” said Finkenauer. The former frontline House member styles herself as a moderate.

John Fetterman, the progressive Pennsylvania lieutenant governor running for Senate, told Axios in a statement: “Now more than ever, Democrats need to vote like Democrats. Protecting the right to vote > Filibuster.”