»MORE: Who was George Floyd?
The law was amended during the Hurricane Katrina crisis while George W. Bush was president. According to the University of Berkeley, Congress amended the act to include natural disasters, epidemics, or other public health emergencies, as well as terrorist attacks. Bush did not invoke the law in his response to the devastating hurricane and its social and political aftermath.
In general, federal troops are not allowed to be used to enforce domestic policy within the boundaries of the U.S. The Posse Comitatus Act, which limits the use of the U.S. military for law enforcement within the U.S., was signed by President Rutherford B. Hayes in 1878, but the Insurrection Act does allow that exception.
On Monday, Trump threatened to call out the U.S. military in response to the deadly riots that have resulted after George Floyd, an unarmed black suspect, died while in custody of the Minneapolis Police Department.
American cities erupted in violence and destruction in a seventh straight night of unrest, with several police officers shot or run over, amid threats from Trump to send in troops to “dominate the streets.”
In New York, protests Monday night were punctuated by people smashing shop windows near Rockefeller Center and breaching the doors of Macy’s flagship store on 34th Street, littering the pavement with broken glass. A vehicle plowed through a group of law enforcement officers at a demonstration in Buffalo, injuring at least two.
Demonstrations also broke out in such places as Philadelphia, where hundreds of protesters spilled onto a highway in the heart of the city; and Nashville, where more than 60 National Guard members put down their riot shields at the request of peaceful protesters who had gathered in front of Tennessee’s Capitol to honor Floyd.
The death toll from the unrest rose to at least nine, including two people killed in a Chicago suburb. The police chief in Louisville, Kentucky, was fired after a beloved restaurant owner was killed by police and National Guard members enforcing a curfew.
More than 5,600 people nationwide have been arrested during the last week for such offenses as stealing, blocking highways and breaking curfew, according to a count by The Associated Press.