In 1916, after intense campaigns by the National Child Labor Committee (NCLC) and the National Consumers League, the Congress passed the Keating–Owen Act, making it illegal to ship goods in interstate commerce if they were made in factories employing children under specified ages. Southern Democrats were opposed but did not filibuster. Wilson endorsed the bill at the last minute under pressure from party leaders who stressed how popular the idea was, especially among the emerging class of women voters. He told Democratic Congressmen they needed to pass this law and also a workman's compensation law to satisfy the national progressive movement and to win the 1916 election against a reunited GOP. It was the first federal child labor law. However, the U.S. Supreme Court struck down the law in Hammer v. Dagenhart (1918). Congress then passed a law taxing businesses that used child labor, but that was struck down by the Supreme Court in Bailey v. Drexel Furniture (1923). Child labor was finally ended in the 1930s.[136] He approved the goal of upgrading the harsh working conditions for merchant sailors and signed LaFollette's Seamen's Act of 1915.