William Francis Hagerty IV is an American politician, businessman, and diplomat serving as the junior United States senator from Tennessee since 2021. A member of the Republican Party, he served as the 30th United States ambassador to Japan from 2017 to 2019 under President Donald Trump. He earned his bachelor's degree from Vanderbilt University in 1981 and his law degree from Vanderbilt University in 1984. Bill Hagerty's career experience included working as the managing director of and founding Hagerty Peterson & Company; an economic advisor to President George H. W. Bush, Tennessee Governor Bill Haslam, and Mitt Romney; on the domestic policy staff of the George H. W. Bush administration; a White House fellow with the NASA administrator and the Office of the Vice President; the national finance chairman of the Mitt Romney 2008 presidential campaign; and the Tennessee commissioner of economic development with the Governor Bill Haslam administration. Hagerty stated: "My lifelong business experience, which gave me firsthand exposure to the crippling overreach of the administrative state, provides unique perspective to the critical debates and lawmaking that takes place in the Senate. I've fought to secure our southern border, support our small businesses, strengthen our national security, and ensure Tennessee's voice is heard in Washington."