>Art. 3, Sec. 2
“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. 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.”
SCOTUS will issue in chambers opinions. It's easy to see this could be the case on one of these original jurisdiction cases.