Specifics of detainments have been scarce, leaving it unclear whether the criminals being targeted make up a significant share of those being captured.

Nearly 1,000 people were arrested by federal agencies in a blitz to enforce immigrations policies across the United States, according to multiple reports.

Immigration and Customs Enforcement has space to detain about 41,000 people a day, but Trump’s "border czar," Tom Homan, wants space to hold over double that amount.