OKLAHOMA CITY (AP) â€” U.S. Sen. Tom Coburn's bitter opposition to government spending appears to be striking a chord with Oklahoma voters, who re-elected the Republican to what he says will be his last term. The Muskogee physician beat an underfunded Democratic candidate and two independents Tuesday. Coburn rode a Republican wave into the U.S. House in 1994, then served six years in Congress before returning to his medical practice. He has described himself as a "part-time lawmaker" and has promised to serve only two terms in the Senate. Known as a conservative maverick, Coburn has been most vocal in opposing the earmarking of special projects, and he is among the few members of the Senate who do not seek such projects for their state.