Who is the current Chief Justice of the United States?

The current Chief Justice of the United States is John Roberts. He was appointed by President George W. Bush and has been serving in this capacity since September 29, 2005. As Chief Justice, Roberts presides over the Supreme Court's public sessions and plays a crucial role in guiding the Court's agenda, including deciding which cases to hear and leading discussions among the justices. His position allows him to have significant influence over the judicial branch of the government, ensuring that the Supreme Court operates effectively in upholding the Constitution and interpreting federal law.

In contrast, the other justices mentioned, such as Ruth Bader Ginsburg, who passed away in September 2020, and Elena Kagan and Clarence Thomas, while notable Supreme Court justices, do not hold the title of Chief Justice. Their roles involve participating in court decisions and opinions, but they do not have the same level of administrative responsibility or influence on the Court's overall direction that the Chief Justice holds.