Former U.S. Sen. Tom Coburn, a physician who became a powerful force in Congress on fiscal matters, died early Saturday morning after a long fight with prostate cancer. He was 72.

Coburn, of Muskogee, served in the Senate from 2005 to 2015 and in the U.S. House of Representatives from 1995 to 2001. After leaving the Senate, he pushed for a constitutional convention and advocated for a range of conservative fiscal causes.

A statement from Coburn’s family on Saturday morning said, “Because of his strong faith, he rested in the hope found in John chapter 11 verse 25 where Jesus said, ‘I am the resurrection and the life. The one who believes in me, will live, even though they die.’ Today he lives in heaven.”