
 
 
February 21, 2020
“Sanctuary” Jurisdictions: Policy Overview
Overview  
How numerous are they? 
Jurisdictions with “sanctuary” policies have been 
In part because there is no agreed-upon classification of 
controversial for decades, highlighting a tension between 
sanctuary jurisdictions, different entities enumerate these 
federal agencies charged with immigration enforcement, 
jurisdictions using different criteria. For instance, the 
and states and localities (e.g., counties, cities) that limit 
Center for Immigration Studies identifies 10 states and 172 
their cooperation in this regard. The prominence of 
localities with sanctuary policies (as of February 2020). The 
immigration enforcement for the Trump Administration, 
Immigrant Legal Resource Center, on the other hand, does 
and the publicity surrounding certain crimes committed by 
not currently enumerate jurisdictions, and instead presents 
some non-U.S. nationals (in statute, “aliens”), particularly 
county-level involvement with ICE as a continuum. An 
those without legal immigration status, have reignited 
exact count of sanctuary jurisdictions also remains 
debates over appropriate levels of immigration enforcement 
imprecise because jurisdictions regularly create, change, or 
within the United States. In 2017, President Trump issued 
eliminate such policies. 
Executive Order 13768 (EO), which included provisions 
that aim to deter certain “sanctuary” policies and promote 
How did they emerge? 
cooperation with federal immigration enforcement 
agencies. 
 In the past decade, sanctuary jurisdictions have largely 
emerged as a response to efforts by DHS to foster federal-
state-local cooperation on immigration enforcement. In 
Who handles immigration enforcement?  
2008, DHS created “Secure Communities,” an information-
The Department of Homeland Security (DHS) is the 
sharing program between the Department of Justice (DOJ) 
primary federal agency responsible for immigration 
and DHS that uses biometric data (i.e., fingerprints) to 
enforcement. Within DHS, Customs and Border Protection 
screen for removable aliens who have been booked into 
(CBP) primarily handles immigration enforcement at U.S. 
jails. Initiated in a dozen jurisdictions, Secure Communities 
borders and ports of entry, and Immigration and Customs 
currently covers all U.S. state and local law enforcement 
Enforcement (ICE) handles immigration enforcement 
jurisdictions. The expansion of Secure Communities 
within the U.S. interior. Some state and local law 
contributed substantially to increased immigration 
enforcement agencies (LEAs) may choose to assist ICE by 
enforcement and greater numbers of alien removals during 
identifying and temporarily detaining removable aliens so 
the past decade, prompting a backlash in some states and 
that ICE may take them into custody. Such cooperation 
localities, particularly those with large foreign-born 
benefits ICE’s mission by acting as a “force multiplier” that 
populations. 
extends the agency’s reach from the roughly 5,300 
deportation officers in its Enforcement and Removal 
Jurisdictions have enacted sanctuary policies for many 
Operations (ERO) division to LEAs throughout the United 
reasons. Some object to ICE’s removal of aliens who, apart 
States. 
from either entering and/or remaining in the United States 
unlawfully, have relatively minor or no criminal records. 
What are sanctuary jurisdictions?  
Others are concerned about family separation—sometimes 
Although some states or municipalities expressly self-
affecting U.S. citizen children—resulting from removal. 
identify as “sanctuary” jurisdictions, the term is not defined 
States and localities may not necessarily be motivated by 
in statute. While policymakers and observers disagree as to 
disagreement with federal policies. Some jurisdictions that 
the range of measures that constitute “sanctuary policies,” 
establish sanctuary policies reportedly are concerned that 
two categories of measures have received particular 
complying with ICE requests to detain individuals might 
attention from the Trump Administration: 
subject them to legal liability. Others, concerned about 
costs, object to using local resources for immigration 
1.  restricting the sharing of information 
enforcement, which they consider a federal responsibility.  
about aliens with immigration authorities; 
and 
What are some key legal issues? 
2.  barring LEAs from complying with ICE 
The conflict between federal immigration objectives and 
requests to notify immigration authorities 
state laws and policies has arisen when a state or locality 
when an alien identified for removal is to 
prohibits information sharing with federal immigration 
be released from LEA custody and, in 
authorities, raising anti-commandeering and other 
some cases, temporarily hold that alien 
federalism and preemption concerns. For further discussion, 
beyond the scheduled date of release so 
see CRS Legal Sidebar LSB10386, Immigration 
that he or she can be taken into federal 
Enforcement & the Anti-Commandeering Doctrine: Recent 
custody. 
Litigation on State Information-Sharing Restrictions, by 
https://crsreports.congress.gov 
“Sanctuary” Jurisdictions: Policy Overview 
Kelsey Y. Santamaria. Additionally, states and localities 
through information sharing and detention. Critics posit that 
have challenged the use of “immigration detainers,” which 
cooperation with ICE permits ICE agents to take custody of 
ICE uses to take custody of aliens who are in the criminal 
such individuals efficiently in low-risk settings (e.g., jails, 
custody of state and local LEAs. Some courts have ruled 
prisons). ICE maintains that, absent such cooperation, its 
that ICE’s practice of issuing detainers violates the Fourth 
agents must use multi-person teams to locate and remove 
Amendment. For further discussion, see CRS Legal Sidebar 
released individuals under more hazardous circumstances. 
LSB10375, Immigration Detainers: Background and 
Other critics contend that sanctuary jurisdictions encourage 
Recent Legal Developments, by Hillel R. Smith. 
aliens to illegally enter or remain in the United States by 
protecting them from immigration enforcement.  
How has the Trump Administration responded?  
The President’s 2017 EO aims to withhold certain streams 
What do defenders of sanctuary laws and 
of federal funding from states and localities that do not 
policies argue?  
comply with 8 U.S.C. §1373. That provision prohibits 
Defenders maintain that states and localities should not use 
federal, state, and local government entities from restricting 
their resources for federal immigration enforcement efforts, 
the flow of information to or from DHS regarding an 
and particularly on foreign residents who have relatively 
individual’s citizenship or immigration status. The EO 
minor or no criminal records, and whose removal in some 
grants DHS authority to designate any state or locality as a 
cases leads to family separation. They contend that state 
sanctuary jurisdiction and take “appropriate enforcement 
and local LEA cooperation with ICE confounds the 
action” against a jurisdiction that violates 8 U.S.C. §1373 or 
perceived relationship between criminal law enforcement 
otherwise limits federal immigration enforcement. The EO 
and immigration enforcement, inhibiting crime victims and 
states that sanctuary jurisdictions are ineligible to receive 
potential witnesses from reporting crimes for fear of 
federal grants, which are not specified in the EO. Then-
possible immigration-related consequences. Defenders also 
Attorney General Jeff Sessions subsequently indicated that 
cite legal and constitutional arguments to maintain that 
non-compliant jurisdictions would face restrictions on funds 
sanctuary policies are appropriate.  
from the Edward Byrne Memorial Justice Assistance Grant 
(JAG) program. JAG grants support LEAs, and total 
What has Congress proposed?  
roughly $450 million annually. For more information, see 
CRS InFocus CRS In Focus IF10691, The Edward Byrne 
In the 116th Congress, legislation has been introduced—
Memorial Justice Assistance Grant (JAG) Program, by 
such as the No Federal Funding to Benefit Sanctuary Cities 
Nathan James.  
Act (H.R. 1885) and the Ending Sanctuary Cities Act of 
2019 (H.R. 516)—that would prohibit sanctuary 
Several states and localities have brought lawsuits, 
jurisdictions (defined as either violating 8 U.S.C. §1373 or 
challenging the withholding of certain federal funds. For 
not complying with ICE detention or notification requests) 
more information, see CRS Legal Sidebar LSB10386, 
from receiving all federal financial assistance. Similarly, 
Immigration Enforcement & the Anti-Commandeering 
the No Funding for Sanctuary Campuses Act (H.R. 768) 
Doctrine: Recent Litigation on State Information-Sharing 
would prohibit federal funding for institutions of higher 
Restrictions, by Kelsey Y. Santamaria. For background 
learning that have sanctuary policies.  
information, also see CRS Report R44789, Sanctuary 
Jurisdictions and Select Federal Grant Funding Issues: In 
Some bills, such as H.R. 1885, contain provisions allowing 
Brief, by Natalie Keegan. 
states and localities to comply with detainers while 
sheltering them from legal liability for doing so. The Justice 
On February 5, 2020, Acting DHS Secretary Chad Wolf 
for Victims of Sanctuary Cities Act of 2019 (H.R. 3964/S. 
announced a policy blocking New York residents from 
2059) would provide a civil remedy for individuals harmed 
enrolling or re-enrolling in federal expedited travel 
by sanctuary jurisdiction policies. Other legislation, such as 
programs after New York passed a state law known as the 
the No Sanctuary for Criminals Act of 2019 (H.R. 1928) 
“Green Light Law.” That law permits unlawfully present 
and the Immigration Detainer Enforcement Act of 2019 
aliens to secure a driver’s license. Of particular relevance to 
(H.R. 4948/S. 2739), would expand ICE’s authority to issue 
DHS, the New York law prohibits the sharing of state 
detainers.  
Department of Motor Vehicle records with DHS. DOJ has 
also filed lawsuits against California, New Jersey, and a 
In contrast, bills that defend sanctuary policies, such as the 
Washington-state county to challenge sanctuary laws and 
End Mass Deportation Act (S. 1591), would rescind EO 
policies that limit cooperation with immigration authorities. 
13768. The PROTECT Immigration Act (H.R. 2729/S. 
1440) would limit ICE’s authority to issue detainers. 
What do critics of sanctuary laws and 
policies argue? 
William A. Kandel, Coordinator, Analyst in Immigration 
Critics contend that sanctuary laws and policies impede 
Policy   
immigration enforcement and create public safety hazards. 
Abigail F. Kolker, Analyst in Immigration Policy   
They cite, among other actions, releasing convicted 
criminals into U.S. communities rather than facilitating 
IF11438
their custody transfer to federal immigration authorities 
 
 
https://crsreports.congress.gov 
“Sanctuary” Jurisdictions: Policy Overview 
 
 
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