The legitimacy and composition of the US Supreme Court can be challenged by bills submitted and passed by Congress. It might not happen right away, but it is time to insist on such actions. Here's one:
The United States is the only major constitutional democracy on Earth that allows lifetime tenure for judges on its highest court.
A bill in Congress, the Supreme Court Tenure Establishment and Retirement Modernization (TERM) Act, would institute term limits of 18 years for Supreme Court justices.
"Sidney M. Wolfe, a doctor turned consumer activist who battled drug companies, lobbyists and regulators during a nearly five-decade crusade against ineffective, risky and overpriced medications that made him a hero to patient advocacy groups and an implacable foe to anyone who opposed him, died Jan. 1 at his home in Washington. He was 86."