No Community Development Block Grants for Sanctuary Cities Act

This bill denies federal Community Development Block Grants (CDBG) to any state or local government designated as a "sanctuary jurisdiction." A sanctuary jurisdiction is defined as one with policies restricting sharing immigration status information with federal authorities or refusing to comply with DHS detainer requests (with an exception for victims/witnesses of crimes). The law amends the 1974 Housing Act to require grant recipients to certify they are not sanctuary jurisdictions and will not become one during the grant period. This directly affects cities or counties with such policies by cutting off a key source of federal funding for housing, infrastructure, and community programs. The policy change is limited to CDBG funding under the 1974 Act, with no broader immigration enforcement provisions.