What political party did WIlliam McKinley belong to?

William McKinley was the twenty-fifth president of the United States, and he was a member of the Republican Party. During the election, the country was still in the midst of an economic depression, and public opinion was split over whether the gold standard or free silver would better the economy. McKinley ran on a platform favoring the gold standard and secured the victory over William Jennings Bryan.
As president, McKinley led the nation to victory in the Spanish-American War, which gave the United States possession of Puerto Rico, Guam, and the Philippines. He also strengthened American industry by raising protective tariffs through the Dingley Tariff Act. McKinley also maintained the gold standard, and throughout his presidency, the economy experienced rapid growth. He was elected for a second term, but he was assassinated only six months into it.