John Nichols Boozman (/ˈboʊz.mən/ BOHZ-mən; born December 10, 1950) is an American politician and former optometrist serving as the senior United States senator from Arkansas, a seat he has held since 2011. A member of the Republican Party, he was the U.S. representative for Arkansas's 3rd congressional district from 2001 to 2011. He is the dean of Arkansas's congressional delegation.