US Senators have reintroduced a bill to overhaul the H-1B and L-1 visa programs, aiming to tighten eligibility and raise hiring standards. The proposal includes mandatory public job postings and new limits on universities, research institutions, and non-profits through the 'Visa Cap Enforcement Act.' It also seeks to restrict extensions and job changes for visa holders, potentially sending some back into the lottery system. The bill awaits Congressional approval to become law.