Daniel Scott Sullivan, born November 13, 1964, in Fairview Park, Ohio, is a Republican U.S. Senator representing the state of Alaska since 2015. He serves as the junior senator and is the only current Senate member still serving in the military as a Colonel in the U.S. Marine Corps Reserve, with over 25 years of service including a 2013 deployment to Afghanistan. Notable achievements include ranking among the Senate's top 10 most effective legislators by the University of Virginia’s Center for Effective Lawmaking, authoring the Save Our Seas Act and SOS 2.0 Act for ocean cleanup, and the POWER Act to aid survivors of domestic violence and sexual assault. He serves on the Armed Services, Commerce, Science, and Transportation, Environment and Public Works, and Veterans’ Affairs Committees, and chairs the International Republican Institute.

Education and Political Experience

Sullivan earned his education before entering public service, clerking for judges on the U.S. Court of Appeals for the Ninth Circuit and the Alaska Supreme Court from 1997 to 1999, followed by private practice as an attorney in Anchorage from 2000 to 2002. In the Bush administration, he worked with the National Economic Council, National Security Council, and as Assistant Secretary of State for Economic, Energy, and Business Affairs under Condoleezza Rice. Politically, he served as Alaska's Attorney General and Commissioner of the Alaska Department of Natural Resources . Elected to the Senate in 2014 by defeating incumbent Mark Begich, he was reelected in 2020 and is running again in 2026.