FBI Director Robert Mueller also criticised the provision for its lack of clarity on how the changes would be implemented at the time of arrest.Christopher Anders, senior legislative counsel at the American Civil Liberties Union (ACLU), said the bill was a “big deal”, adding, “It would authorise the president to order the military to capture civilians and put them in indefinite detention without charge or trial, with no limitation based on either geography or citizenship. The military would have the authority to imprison persons far from any battlefield, including American citizens and including people picked up in the US.”