No Community Development Block Grants for Sanctuary Cities Act

This bill amends federal law to block Community Development Block Grants (CDBG) from going to jurisdictions that qualify as "sanctuary cities." It defines a "sanctuary jurisdiction" as any local or state government that restricts sharing immigration status information with federal authorities or refuses to comply with certain immigration detainer requests. The key provision requires grant applicants to certify they are not sanctuary jurisdictions and will not become one during the grant period. This directly affects cities or counties with policies limiting cooperation with federal immigration enforcement, potentially cutting off a major source of federal funding for community projects. The bill includes a limited exception for policies that protect victims or witnesses in criminal cases.