The US Supreme Court has overturned a Californian law designed to help Holocaust survivors claim money from Nazi-era insurance policies.
It required any insurer doing business in California to search their records for details of the old policies and put them in a public registry.
The insurance companies argued that California was unconstitutional in trying to regulate insurance business outside its borders.
The Bush administration argued that the law hurt the federal government's efforts to speak "with one voice" in foreign affairs.
The Court accepted that argument.