The Senate bill passed (51-50, tie-breaking vote by Vance) on July 1 and the House bill passed (215-214) in May are heading for reconciliation. The Senate’s budget for immigration law enforcement is about $163B; the House bill $170B.
Here is an incomplete summary of the Senate bill’s provisions on enforcement of immigration laws. I have relied in part on the American Immigration Council (here and here).
Mexican Border: $46.5 billion toward fortifying the U.S.-Mexico border wall and interdicting migrant smugglers at sea. Additional staffing funding for CBP, apparently including adding 3,000 more Border Patrol staff. Total CBP staffing at the Mexican border appears to be around 15 – 20,000.
ICE Staffing: $32 billion for immigration enforcement, including staffing of ICE and expanding so-called 287(g) agreements, in which state and local law enforcement agencies partner with federal authorities to deport immigrants. Current staffing of agents appears around 6,000; the Senate and House bills appear to increase agent staffing by 10,000; hence an increase of 160%.
Detention: $45 billion to build and operate immigrant detention facilities and to transport those being deported. This is intended to increase detention capacity from about 50,000 to over 100,000. (In prior administrations, roughly 35,000 persons were detained on any given day). 62% larger budget than the entire federal prison system. The budgets include funds to reimburse states and localities for use of their detention facilities.
The bill allows for families to be detained indefinitely, pending a removal decision. This dismantles the Flores settlement agreement, in place since 1977 and limiting to 20 days the duration children can legally be detained.
Local assistance: $13.5 billion to reimburse states and local governments for immigration-related costs. Most of these funds are to be given to Texas. These funds appear to be on top of reimbursement for detention facilities
Immigration courts: caps the number of judges at 800; current staffing is about 700.