If the dog is wet and shivering, then it's shaking because it's cold and needs to be dried off and warmed up. If it hasn't been running or playing or been wet or cold, then you need to take it to a vet, immediately. It could be any number of diseases or toxins, and you can't help it if you don't know what it is.
The Supreme Court of the United States. The Supreme Court of the United States is the highest court in the land and the only part of the federal judiciary specifically required by the Constitution. The Constitution does not stipulate the number of Supreme Court Justices; the number is set instead by Congress.
In other words, each branch helps balance against the other branches by checking their powers. The other branches of the government can check the judicial branch through the nomination and appointment process. The actual people who make up the judicial branch, the judges and justices, must be nominated by the executive branch and approved by the legislative branch. This gives the other branches of government an important say in what kind of people will work for the judicial branch.