Union membership in the U.S. has fallen from 30% of workers in the 1950s to ~10% today (6% in the private sector). Reform proposals — most prominently the Protecting the Right to Organize (PRO) Act — would strengthen organizing rights, weaken right-to-work laws, and impose penalties for employer interference.
Specific provisions in the PRO Act include: card-check / "neutrality agreements" instead of secret-ballot elections, civil penalties on employers who violate labor law, banning permanent striker replacement, and reclassifying many "independent contractors" as employees.
Defenders argue the current law tilts heavily toward employers and explains union decline. Critics argue card-check violates worker secret-ballot rights and that union expansion harms competitiveness.