No — there is currently no reliable public source that confirms Dan Sullivan is left-handed.
Dan Sullivan is an American politician serving as the junior United States Senator from Alaska. A member of the Republican Party, he assumed office in 2015.
Prior to his Senate career, Sullivan served as the Attorney General of Alaska from 2009 to 2010. He also held various positions in the U.S. Marine Corps Reserve, reaching the rank of lieutenant colonel.
Sullivan's political career began after a background in law and military service. He graduated from Harvard University and Georgetown University Law Center, subsequently working as a law clerk and practicing law.
As a senator, he focuses on issues critical to Alaska, including energy, natural resources, national security, and military affairs, advocating for his state's interests in Washington D.C.
