In a set of rulings — one testing whether Congress can obtain financial records of the president from third parties (Mazars USA, Deutsche Bank and Capital One) and the other whether the president is immune from state criminal investigation (in this case, a subpoena from Manhattan District Attorney Cyrus R. Vance Jr. on possible tax violations) while in office — the Supreme Court, with votes from both of President Trump’s appointees, effectively held the president is not above the law, dealing a blow to his delusions of absolute power.