More: Chief Justice John Roberts slipped the allowance into his majority opinion, as the justices ruled 6"3 in Trump's favor along ideological lines. In a quiet sentence, Roberts argued that the fresh take on the executive branch relationship would help the president carry out his constitutional duties.

"The president may discuss potential investigations and prosecutions with his Attorney General and other Justice Department officials to carry out his constitutional duty to take care that the laws be faithfully executed,'" Roberts wrote.

"And the Attorney General, as head of the Justice Department, acts as the President's chief law enforcement officer' who provides vital assistance to [him] in the performance of [his] constitutional duty to preserve, protect, and defend the Constitution,'" Roberts continued, citing a precedent from an immunity case argued for Cabinet members, Mitchell v. Forsyth.

This means that if Trump returns to office, he will have free rein to wield the Justice Department as he sees fit"and he and his allies have already given plenty of indications as to what they plan to do.