There are so many mistaken assumptions in this question that it's essentially unanswerable.
The branches of government are supposed to work like this:
legislative : makes laws
judicial : interprets laws
executive : enforces laws
So right away you can see that asking how the Supreme Court enforces a law is nonsense ... they're not part of the branch of government that does that.
The Supreme Court can nullify an Act of Congress. They would have to say that it specifically contridicted the Constitution. The President could affect a law by refusing to enforce it.
The Supreme Court can declare a law passed by Congress to be unconstitutional and therefore null and void. The President can veto laws by Congress and fail to enforce them if his party has an impeachment-proof minority in Senate.
The president has federal agencies and the armed forces to enforce policies and laws. However Congress has the purse strings to fund this.
Only Congress can pass laws, but the President can fail to enforce them and the Supreme Court can nullify them. Only Congress can appropriate money but only the President can spend it and he has considerable leeway on how he spends it. Only the Senate can ratify a treaty, but the President can make agreements with foreign countries and not send them to the Senate.
The US Supreme Court lacks the ability to enforce its own decisions, which is a check on the Judicial Branch of government. The Executive Branch is vested with the authority and obligation to enforce Supreme Court decisions, and the Legislative branch can support a decision by passing laws upholding the Court's finding.
It authorized the president to use military to enforce acts of Congress.
The US president puts forward a bill to House of Representatives then it goes to the Senate if it passes through both of these houses it is then signed by the president. Then it goes before the Supreme Court who check to make sure it is constitutional. Then the police or FBI enforce the law by bring offenders before courts for sentences.
The President and his group enforce the law and ensure that laws of the nation are carried out correctly. The 9 justices of the Supreme Court, in the Supreme Court building, ensure that the laws made by Congress are constitutional.
allowed the president to use military to enforce acts of congress
Force bill
Congress can amend the constitution, but not without a vote. They can also call a constitutional convention to rewrite a whole or part of the constitution, but again, not without a vote. Although, there are ways around the constitution. For example, if congress passed an unconstitutional law and the president signed it, the supreme court may rule the law as unconstitutional, but because it is the president's job to enforce the law, he can disregard their ruling, even though this generally leads to a huge drop in popularity.
The 20th amendment to the U.S. constitution enforces the commencement of the terms of the President, Vice President, and Members of Congress.