Sen. Sam Brownback became at least the third Republican to announce he will vote against Sonia Sotomayor's nomination to the Supreme Court.

"Judge Sotomayor has indicated through past rulings and in her writings that she believes the judiciary should take an activist role and make laws, instead of upholding the law," he said in a speech Wednesday on the Senate floor. "As Chief Justice [John G.] Roberts said, a justice should be an impartial umpire, not a player in the game. I am afraid Judge Sotomayor wants to be more of a player than an umpire."

Brownback, who is not running for a third term and is preparing to run for governor back home in Kansas, was a member of the Senate Judiciary Committee until this year.