WASHINGTON, D.C. — On Wednesday, President Trump praised a major California county for joining his administration’s legal challenge to the state’s new limits on how much local police and sheriff’s departments support his rigorous deportation policy.

“My Administration stands in solidarity with the brave citizens in Orange County defending their rights against California’s illegal and unconstitutional Sanctuary policies,” Trump wrote in a tweet.

The Justice Department had earlier welcomed the decision by California’s third largest county to join its lawsuit challenging the “sanctuary state” law that Democratic-governed California enacted late last year. The Orange County board of supervisors voted unanimously on Tuesday evening to link arms with the administration.

The law bars local law enforcement from supporting Republican Trump’s crackdown on illegal immigration with money, facilities and access to people held in custody. As a presidential candidate in 2016, Trump promised to take a tough stance on immigration and refugees. Since taking office he has zealously pursued his promises to construct a wall along the country’s border with Mexico and ramp up deportations.

The Justice Department, led by Republican Attorney General Jeff Sessions, has sued cities that officially do not cooperate with federal authorities in order to provide “sanctuary” to immigrants residing within their borders illegally.