Can congress expand the scope of the supreme court’s original jurisdiction beyond what is specified in article iii of the constitution by simply passing a law?

The answer is No. The explanation behind this is found in Article III, it is stated there that the “Supreme Court shall have original jurisdiction in all circumstances touching ambassadors, other public ministers and diplomats, and those in which a state shall be a party. In all other circumstances the Supreme Court shall have appellate jurisdiction”. Therefore if the legislature augments to their jurisdictions, then there would be numerous courts with definite jurisdiction.

an obstruction