Roger Wayne Marshall (born August 9, 1960) is an American politician and obstetrician. Marshall is the junior United States Senator from Kansas since 2021. He was the U.S. Representative for . He was elected in 2016. Marshall is a Republican. In August 2020, he became the Republican nominee for the United States Senate seat being left empty by Pat Roberts' retirement. He would go on to defeat Barbara Bollier in the November 2020 election.