Answer:
1. cases affecting ambassadors, other public ministers and consuls, and those in which a state shall be a party.
2. Yes, Congress has the authority to change the Court's jurisdiction
Explanation:
1. The United States Constitution under Article III Section II stated among other things that "In all cases affecting ambassadors, other public ministers and consuls, and those in which a state shall be a party, the Supreme Court shall have original jurisdiction..."
2. Yes, Congress has the authority to change the Court's jurisdiction, particularly the Supreme Court's appellate jurisdiction over specific cases, or matters.
This is evident in the fact that Article III section II also stated among other things that "In all the other Cases before mentioned, the Supreme Court shall have appellate jurisdiction, both as to law and fact, with such Exceptions, and under such regulations as the Congress shall make."