A conservative legal group with a long record of attacking voting rights filed a lawsuit against California’s Proposition 50, seeking to block the state’s voter-approved congressional map.

The Public Interest Legal Foundation (PILF) — known for pushing aggressive lawsuits aiming to purge voter rolls and undermine federal voting protections — filed the new complaint Tuesday in federal court.

The lawsuit is the second aiming to overturn Proposition 50 since voters overwhelmingly passed it November 4.

The measure authorizes a temporary congressional map to counter the extreme gerrymandering demanded by President Donald Trump in Republican-controlled states, like Texas.

PILF has significant influence in Trump’s Washington, D.C. A former lawyer for the group now leads the voting section at the U.S. Department of Justice (DOJ). And its founder, Christian Adams, was a member of Trump’s short-lived voter fraud commission, launched in 2017.