A federal appeals court late Thursday paused a ruling that required President Donald Trump to return control of members of California’s National Guard to the state.

A federal judge has ruled that President Trump’s call-up of the California National Guard was illegal, prompting an immediate appeal from the Trump administration. The troops will remain in place for at least a few days after the 9th Circuit Court of Appeals granted an administrative stay of the judges ruling.

U.S. District Judge Charles R. Breyer for the Northern District of California ruled that the decision to deploy the National Guard amounts to “serious injury to the constitutional balance of power between the federal and state governments, and it sets a dangerous precedent for future domestic military activity.”