The United States Supreme Court has 9 members. The oldest is Ruth Bader Ginsburg, age 87. She doesn't want to retire because she doesn't want Trump to choose the next Justice.

The Supreme Court of the United States

The Washington Post

Ruth Bader Ginsburg hospitalized with possible infection after experiencing fever and chills

The Supreme Court justice is expected to remain at Johns Hopkins Hospital in Baltimore for a few days and will be treated with antibiotics, according to a news release from the court. It described her as "resting comfortably."