High Quality Content by WIKIPEDIA articles! Mark Odom Hatfield (July 12, 1922 – August 7, 2011) was an American politician and educator from the state of Oregon. A Republican, he served for 30 years as a United States Senator from Oregon, and also as chairman of the Senate Appropriations Committee. A native Oregonian, he served in the United States Navy in the Pacific Theater during World War II after graduating from Willamette University. After the war he earned a graduate degree from Stanford University before returning to Oregon and Willamette as a professor.