In all Cases affecting Ambassadors, other public Ministers and Consuls, and those in which a State shall be Party, the supreme Court shall have original Jurisdiction. ... No Person shall be convicted of Treason unless on the Testimony of two Witnesses to the same overt Act, or on Confession in open Court.

Shall extend all cases affecting the ambassadors?

In all cases affecting ambassadors, other public ministers and consuls, and those in which a state shall be party, the Supreme Court shall have original jurisdiction.

What is the meaning of Article 3 section 2?

Section 2 of Article III describes the jurisdiction of the federal courts. Jurisdiction is the power of a court to hear a case, so this section tells us what kinds of cases the Supreme Court and other federal courts will hear. All cases that arise under the Constitution, the laws of the United States or its treaties.