Civil liberties and immigration rights groups worry U.S. President-elect Donald Trump's incoming administration could use powerful law-enforcement surveillance and big-data technology to press ahead with some key policies, risking infringing on privacy rights.

Republican Trump has repeatedly said he would "militarize" certain law-enforcement activities, which could involve using the military for domestic law enforcement, though he has not provided any specifics.

In July it was reported that a victorious Trump could use surveillance systems and artificial intelligence to supercharge his plan to carry out a mass deportation of illegal immigrants.