Former Oregon Gov. and Sen. Mark Hatfield (R) has died at the age of 89.

A vocal opponent of the Vietnam War, he was one of the first Republicans to speak out against the conflict.

After eight years as governor, Hatfield won election to the Senate in 1966. He would go on to serve for 30 years. Hatfield was chairman of the Senate Appropriations Committee for six years.

Hatfield had lived in Oregon since retiring from the Senate in 1996, the Portland Oregonian reported.In a statement, Oregon Gov. John Kitzhaber (D) praised the former senator. "We've lost a true statesman whose legacy lives on," wrote Kitzhaber.

National Association of Broadcasters President and CEO Gordon Smith, a former Oregon Senator, called Hatfield "Oregon's greatest public servant of the 20th century" in a statement released Monday. "If Oregon had a Mt. Rushmore for its public servants, Senator Hatfield would be on it,” Smith wrote “His uniquely independent voice allowed him to represent the best interests of Oregonians.”

This report was posted on Aug. 8 at 7:39 a.m. and has been updated.