In ruling against the detainees, the court said that "high officers who face personal liability for damages might refrain from taking urgent and lawful action in a time of crisis."
The six men, all of Arab or South Asian descent, were in the U.S. illegally when they were detained. They say they were held under harsh conditions after the September 11 attacks.
It offers the court a chance to formally determine a metric on what constitutes unlawful gerrymandering, which could have major implications for the way voting districts are drawn in other states.
Legislators in at least four states are now trying to make sure that rewarding jailhouse informants — with cash, perks or deals for freedom — isn't leading to wrongful convictions.
The not-guilty verdict in the 2016 police shooting death of Philando Castile during a traffic stop sparked protests in St. Paul, Minn. Friday night, but none turned violent.