Who is the current Chief Justice of the United States?

The current Chief Justice of the United States is John Roberts. He was appointed to this position by President George W. Bush and has been serving as Chief Justice since September 29, 2005. As Chief Justice, Roberts plays a crucial role in the Supreme Court, presiding over oral arguments and participating in the decision-making process. His leadership has significantly influenced the direction of the Court on various important legal issues.

The other individuals mentioned in the options have held significant positions within the Supreme Court but are not the current Chief Justice. Ruth Bader Ginsburg, for instance, served as an Associate Justice until her passing in 2020, while Clarence Thomas is currently an Associate Justice appointed in 1991. Anthony Kennedy, also an Associate Justice, retired in 2018. Their respective roles and tenures highlight the importance of understanding the current composition of the Supreme Court and the distinction between different judicial positions.