The Supreme Court of the United States is the highest judicial instance. The highest federal court in the United States that has a dominating position among all U.S. courts. In 1789 it was established in accordance with Article Three of the United States Constitution. The Supreme Court has ultimate appellate jurisdiction over all federal courts and state court cases concerning issues of federal law, and original jurisdiction over a small range of cases. It mostly reviews the decisions of lower courts serving as the main arbiter of disputes, but also, it may decide cases having a political subtext. The most decisive power of the Supreme Court is judicial review, the ability to check the constitutionality of actions undertaken by the other branches of American government, on the federal and state level. The Supreme Court consist of nine Justices, where one is a Chief Justice, and other eight are Associate Justices. All Justices are nominated by the President and confirmed by the Senate. After being appointed, Justices have a lifelong term. Justice can resign or retire, but if someone needs to remove a Justice from the Supreme Court it could be done only in a constitutional way through the sentencing verdict reached after the impeachment process.The American courts and judges have a special position among other branches of government. This position has acquired due to decisions in various legal cases, most of which relate to the foundation of U.S. constitutional law. Despite the fact that the President is the Chief Executive appointed with broad powers, and Congress is the main law-making body, the United States Supreme Court forms the meaning of the main constitutional rules and norms. First of all the Constitution was created to make a balanced system, where all branches of power: the judiciary, the legislature, and the executive would equally take part in the process of governing the country. However, during centuries there were many changes that altered the balances and system the separation of powers doctrine, hindering conception of the Constitution as a document that ensures equality to the American governmental system. Mainly due to the role of the Supreme Court in shaping the scope of contemporary legal, economic and social relations in the United States these changes have occurred.