The Trump administration on Wednesday sued to try to block California from engaging in international efforts against climate change, charging that the state exceeded its constitutional authority by joining with a Canadian province in a program to cut climate-damaging fossil fuel emissions.

The suit, filed in federal court in California, is the latest Trump administration push to stymie state efforts aimed at contesting the administration’s rollbacks of environmental and climate protections. California says it’s being punished for its advocacy.

The complaint, which names Democratic Gov. Gavin Newsom and others, alleges that California usurped federal power to conduct foreign policy and make international accords when it signed an ongoing agreement with Quebec to limit emissions.

California “veered outside its proper constitutional lane,” Assistant U.S. Attorney General Jeffrey Bossert Clark said in a statement.

Newsom countered that the administration was “continuing its political vendetta against California, our climate policies and the health of our communities.”