The antigraft organization Transparency International described Iraq in 2015 as suffering extensive, pervasive corruption across all levels of government and sectors.
The Supreme Court's opinion Thursday overruled a pair of decades-old decisions that states said cost them billions of dollars in lost revenue annually.
Kennedy wrote that the rule " 'limited' states ability to seek long-term prosperity and has prevented market participants from competing on an even playing field. "
The authorities at all levels of government set into motion a vast response plan that included thousands of National Guard soldiers and scores of aircraft.