Ford reluctantly signed the bill into law in October 1974. In the 1976 case of Buckley v. Valeo, the Supreme Court overturned the cap on self-funding by political candidates, holding that such a restriction violated freedom of speech rights. The campaign finance reforms of the 1970s were largely unsuccessful in lessening the influence of money in politics, as more contributions shifted to political action committees and state and local party committees. In the Middle East and eastern Mediterranean, two ongoing international disputes developed into crises during Ford's presidency. In mid-August, the Greek government withdrew Greece from the NATO military structure; in mid-September 1974, the Senate and House of Representatives overwhelmingly voted to halt military aid to Turkey. Ford vetoed the bill due to concerns regarding its effect on Turkish-American relations and the deterioration of security on NATO's eastern front. A second bill was then passed by Congress, which Ford also vetoed, although a compromise was accepted to continue aid until the end of the year. As Ford expected, Turkish relations were considerably disrupted until 1978.