The first point to make here, and the most important one, is that no one has the authority to reject or defy a constitutional decision from the Supreme Court. That is how our system of government works and has worked for the whole of our history. For better or for worse, the Supreme Court has the last word on the meaning of the Constitution.
The court's power to enforce its decisions is, of course, limited. Their practical efficacy may depend on how willing the other branches of the federal government are to support the court. In 1832, the Supreme Court decided Worcester v. Georgia, which recognized the rights of Native American tribes. President Andrew Jackson was supposed to have