What is the power to issue executive orders?

If the executive order is given as part of directing the armed forces in war time, hosting foreign dignitaries, or enforcing federal law or the U.S. Constitution, it is simply called the power of the presidency. If the executive order is in effect a new law or a modification to an existing law, it is the power of luck, because at that point the President is lucky that the House of Representatives has not impeached him for violating the Constitution.