North Carolina Sen. Thom Tillis said Wednesday he won’t vote for Supreme Court nominee Ketanji Brown Jackson despite admitting she is “well-qualified” for the role.

“There is no doubt that Judge Jackson is well-qualified and her nomination as the first black woman to the Supreme Court is historic. I was impressed with her knowledge, her composure, and her character during more than 20 hours of questioning,” said Tillis, who is one of 11 Republicans on the 22-member Senate Judiciary Committee who interviewed Jackson last week.