The Sherman Act did not have the immediate effects its authors intended, although Republican President Theodore Roosevelt's federal government sued 45 companies, and William Taft used it against 75 companies. The Clayton Act of 1914 was passed to supplement the Sherman Act. Specific categories of abusive conduct were listed, including price discrimination(section 2), exclusive dealings (section 3) and mergers which substantially lessened competition (section 7). Section 6 exempted trade unions from the law's operation. Both the Sherman and Clayton Acts are now codified under Title 15 of the United States Code.