A federal court threw out a lawsuit by Arizona Gov. Jan Brewer accusing the federal government of failing to enforce the immigration laws or control her state’s border with Mexico.

U.S. District Judge Susan Bolton said Brewer’s claim that the federal government from an “invasion” of illegal immigrants was a political question, and not something a court should decide.

Brewer’s suit was filed after the U.S. Department of Justice sued Arizona to block the state’s controversial immigration law.

She said the court’s ruling was “frustrating but not entirely surprising.”

“It is but the latest chapter in a story that Arizonans know all too well: the federal government ignores its Constitutional and statutory duty to secure the border. Federal courts avert their eyes. American citizens pay the price.”

The U.S. Justice Department said it was pleased by the decision. Brewer has asked the U.S. Supreme Court to hear her appeal of the Bolton ruling