Republican Sen. Thad Cochran of Mississippi said he will vote against the confirmation of Sonia Sotomayor to the U.S. Supreme Court.
Cochran did vote to confirm her to a federal appeals court in New York in 1998.
Cochran said Wednesday that some of Sotomayor's statements over the past decade caused him to question her "fidelity to equal justice."
Cochran said because the Supreme Court is not bound by existing legal precedents, "there would be no higher court to deter Judge Sotomayor from making decisions that would become the binding law."
Mississippi's other U.S. senator, Republican Roger Wicker, said Tuesday he opposes confirming Sotomayor, who was nominated by President Obama.