Who currently holds the position of Chief Justice of the United States?

The position of Chief Justice of the United States is currently held by John Roberts. He was nominated by President George W. Bush and took his oath of office on September 29, 2005. As Chief Justice, Roberts leads the Supreme Court, decides on the administration of the Court, and plays a crucial role in shaping its workflow and agenda.

His leadership has been significant in key cases, influencing decisions on important legal and constitutional issues. This role also includes presiding over presidential impeachment trials in the Senate and ensuring the judiciary's independence and integrity.

In contrast, the other individuals listed either no longer hold significant judicial positions or have retired, with Ruth Bader Ginsburg having passed away in September 2020, Clarence Thomas serving as an Associate Justice, and Anthony Kennedy having retired from the Supreme Court in 2018. Thus, the current holder of the Chief Justice position is indeed John Roberts.