A major turning point in the history of the NLRB came in 1947 with passage of the Taft-Hartley Act. Disruptions caused by strikes during World War II as well as the huge wave of strikes that followed the end of the war fueled a growing movement in 1946 and 1947 to amend the NLRA to correct what critics saw as a pro-labor tilt in federal law. Drafted by the powerful Republican Senator Robert A. Taft and the strongly anti-union Representative Fred A. Hartley, Jr., the Taft-Hartley Act banned jurisdictional strikes, wildcat strikes, political strikes, secondary boycotts, secondary picketing, mass picketing, union campaign donations made from dues money, the closed shop, and unions of supervisors. The act also enumerated new employer rights, defined union-committed ULPs, gave states the right to opt out of federal labor law through right-to-work laws, required unions to give an 80-days' strike notice in all cases, established procedures for the President to end a strike in a national emergency, and required all union officials to sign an anti-Communist oath. Organizationally, the act made the General Counsel a presidential appointee, independent of the board itself, and gave the General Counsel limited powers to seek injunctions without referring to the Justice Department. It also banned the NLRB from engaging in any mediation or conciliation, and formally enshrined in law the ban on hiring personnel to do economic data collection or analysis.