Detention/Mandatory Detention
Mandatory detention is the practice of imprisoning an individual under specified circumstances, without regard to whether doing so is necessary or appropriate in the individual case. U.S. immigration law subjects various categories of noncitizens to mandatory detention, including certain asylum seekers; certain noncitizens subject to a final order of removal; and noncitizens who are deportable because of certain criminal activity–a category that includes even long-time green card holders convicted of relatively minor drug or theft offenses. Most immigrants detained in the United States are mandatorily detained, more than 200,000 immigrants are subjected to mandatory detention every year (pre-pandemic), and many are detained for prolonged periods.
Cases
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Arizona v. DHS (AZ ICE Priorities) - Court of Appeals
ICEDetention/Mandatory DetentionParoleProsecutorial Discretion[ARCHIVED-September 2025] This was an appeal by the States of Arizona and Montana of a district court order dismissing their claims against immigration enforcement guidance, issued in January and February 2021, for Immigration and Customs Enforcement (ICE) to consider when prioritizing cases for...Read more -
Florida v. USA (FL ICE Priorities) - District Court
Detention/Mandatory DetentionParoleProsecutorial DiscretionICE[ARCHIVED-September 2025] In March 2021, the State of Florida sued the Biden Administration regarding immigration enforcement guidance, issued in January and February 2021, for Immigration and Customs Enforcement (ICE) to consider when prioritizing cases for enforcement and deportation (e.g. whether...Read more -
West Virginia v. DHS (WV RMX) - District Court
Detention/Mandatory DetentionMPP/RMX (Remain in Mexico)Parole[ARCHIVED - September 2025] In August 2021, West Virginia sued the Biden Administration for ending a policy, created in late 2018 by the Trump Administration, under which certain asylum seekers are returned to Mexico and forced to wait there for the months or years required for the U.S. government...Read more -
Arizona v. DHS (AZ ICE Priorities) - District Court
ICEDetention/Mandatory DetentionParoleProsecutorial Discretion[ARCHIVED-September 2025] In early 2021, Arizona and Montana sued the Biden Administration regarding immigration enforcement guidance, issued in January and February 2021, for Immigration and Customs Enforcement (ICE) to consider when prioritizing cases for enforcement and deportation (e.g. whether...Read more -
Texas v. USA (TX Deportation Moratorium) - District Court
Detention/Mandatory DetentionProsecutorial DiscretionICE[ARCHIVED-September 2025] The day President Biden was inaugurated, his Department of Homeland Security (DHS) issued a memorandum pausing most deportations for 100 days while the new administration issued new immigration enforcement guidance. Texas sued two days later, claiming that the challenged...Read more
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