This bill, known as the "287(g) Expansion Act," aims to incentivize state and local jurisdictions to participate in federal immigration enforcement by authorizing increased Edward Byrne Memorial Justice Assistance Grant (JAG) funding. It specifically targets any state or political subdivision that enters into a 287(g) agreement with U.S. Immigration and Customs Enforcement, which allows local law enforcement to perform certain immigration functions. Upon application and confirmation of a 287(g) agreement, the Attorney General, in collaboration with the Secretary of Homeland Security, is mandated to increase the applicant's annual JAG allocation by up to 10 percent of their average funding from the three most recent years. To support these increased allocations, the bill authorizes an appropriation of $20,000,000 for each fiscal year from 2027 through 2033.