Reed Smoot (January 10, 1862 – February 9, 1941) was an American politician, businessman, and apostle of the Church of Jesus Christ of Latter-day Saints (LDS Church). A Republican who was first elected to the U.S. Senate by the Utah State Legislature in 1902, he served from 1903 to 1933. Smoot is primarily remembered as the co-sponsor of the 1930 Smoot–Hawley Tariff Act, which increased almost 900 American import duties. Criticized at the time as having "intensified nationalism all over the world" by Thomas Lamont of J.P. Morgan & Co., Smoot–Hawley is widely regarded as one of the catalysts for the worsening Great Depression.
Smoot was a prominent leader of the LDS Church, called to serve as an apostle and member of the Quorum of the Twelve in 1900. His role in the church, together with rumors of a secret church policy continuing polygamy and a secret oath against the United States, led to a four-year controversy after he was elected to the Senate. A Senate committee investigated his eligibility to serve, known as the Reed Smoot hearings, and recommended against him, but the full Senate voted to seat him.