I beleive Congress has the power to ask that the Supreme not rule on certain un-constitutional items....But, that would require a Republican with some backbone.
Congress does not have the power to ask.
Congress has the power to command.
Article III, section 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"