What is the highest court of the judicial branch of the government?
Is State laws under the jurisdiction of the executive legislative or judicial branch of the Government?
The Supreme Court of the United States, as an institution, is the highest part (court) of the Judicial Branch of government. The Chief Justice of the United States (colloquially known as Chief Justice of the Supreme Court) leads during his tenure. Chief Justice John G. Roberts, Jr., has presided over the US Supreme Court since 2005.