Executive, Limitations on Presidential Power
Despite their wide-ranging authority, presidents have limits on their power. While the Supreme Court, the media, and public opinion can affect presidential actions, Congress has the greatest ability to limit the president's power. Congress can check presidential power by refusing to appropriate funds for a presidential initiative, whether domestic or international. It can also refuse to confirm presidential appointees, such as ambassadors or Supreme Court justices. And ultimately only Congress can write and pass the laws that the executive branch is constitutionally obligated to implement.