William McKinley was the 25th President of the United States, serving from 1897 until his assassination in 1901. He was a strong supporter of the gold standard and believed in the power of the federal government to regulate business and promote economic growth. During his presidency, McKinley signed the Gold Standard Act, which established the gold dollar as the standard unit of value, and he also oversaw the passage of the Sherman Antitrust Act, which aimed to limit the power of large corporations. McKinley's foreign policy was marked by the Spanish-American War, which resulted in the acquisition of several territories, including Puerto Rico, Guam, and the Philippines. He was known for his conservative and moderate political views, and his presidency was marked by a period of economic growth and prosperity.