Title: Executive order
Content:   In the United States, an executive order is a directive by the President of the United States that manages operations of the federal government. The legal or constitutional basis for executive orders has multiple sources. Article Two of the United States Constitution gives the president broad executive and enforcement authority to use their discretion to determine how to enforce the law or to otherwise manage the resources and staff of the executive branch. The ability to make such orders is also based on expressed or implied Acts of Congress that delegate to the president some degree of discretionary power (delegated legislation). Like both legislative statutes and the regulations promulgated by government agencies, executive orders are subject to judicial review and may be overturned if the orders lack support by statute or the Constitution. Some policy initiatives require approval by 
Title: Executive order
Content:  The United States Constitution does not have a provision that explicitly permits the use of executive orders. ArticleII, Section1, Clause1 of the Constitution simply states: "The executive Power shall be vested in a President of the United States of America." Sections2 and3 describe the various powers and duties of the president, including "he shall take Care that the Laws be faithfully executed". The U.S. Supreme Court has held that all executive orders from the president of the United States must be supported by the Constitution, whether from a clause granting specific power, or by Congress delegating such to the executive branch. Specifically, such orders must be rooted in Article II of the US Constitution or enacted by the Congress in statutes. Attempts to block such orders have been successful at times, when such orders either exceeded the authority of the President or could be better handled through legislation. The Office of the Federal Register is responsible for assigning the executive order a sequential number, after receipt of the signed original from the White House and printing the text of the executive order in the daily Federal Register and eventually in Title3 of the Code of Federal Regulations.
Title: Executive order
Content:  legislative branch, but executive orders have significant influence over the internal affairs of government, deciding how and to what degree legislation will be enforced, dealing with emergencies, waging wars, and in general fine-tuning policy choices in the implementation of broad statutes. As the head of state and head of government of the United States, as well as commander-in-chief of the United States Armed Forces, only the President of the United States can issue an executive order. Presidential executive orders, once issued, remain in force until they are canceled, revoked, adjudicated unlawful, or expire on their terms. At any time, the president may revoke, modify or make exceptions from any executive order, whether the order was made by the current president or a predecessor. Typically, a new president reviews in-force executive orders in the first few weeks in office.
Title: Decree
Content:  President (as stated in Art. 16 of the 1958 Constitution, exercised only once so far), the executive can issue decrees in areas that the Constitution grants as the responsibility of Parliament only if a law authorizes it to do so. In other cases, orders are illegal and, should anyone sue for the order's annulment, it would be voided by the Council of State. There exists a procedure for the Prime Minister to issue ordinances in such areas, but this procedure requires Parliament's express consent (see Art 38 of the 1958 Constitution). Orders issued by the Prime Minister take two forms: Sometimes, people refer to décrets en 
Title: Executive order
Content:  the Congress or the Constitution. Presidents since that decision have generally been careful to cite the specific laws under which they act when they issue new executive orders; likewise, when presidents believe that their authority for issuing an executive order stems from within the powers outlined in the Constitution, the order instead simply proclaims "under the authority vested in me by the Constitution". Wars have been fought upon executive order, including the 1999 Kosovo War during President Bill Clinton's second term in office; however, all such wars have also had authorizing resolutions from Congress. The extent to which the president may exercise 
Title: State executive order
Content:  Powers of executive order can be either constitutional, statutory, implied, or ‘general authority only' (Wyoming). In most state constitutions, there is no specific provision for the power of governors to issue executive orders. However, in many of those constitutions, there is a provision stating that the “executive power shall be vested in the governor” (New York) or “the supreme executive power of this State, shall be vested in a...Governor...” (Nevada), or similar. These sections supplement and give way for executive and state law that grants the powers of issuance of executive orders to governors.
Title: State executive order
Content:  In the United States, a state executive order is a directive issued by a governor that regulates operations of the state government and certain aspects of citizen life. Powers of state executive orders are limited by the respective state constitution and/or executive and state law, and are also subject to the provisions of the United States Constitution and any applicable federal law. Similar to presidential executive orders, they are subject to judicial review and can be invalidated if determined to violate any statutes or codes by which they are governed. The majority of them carry the force of law and remain in effect until revoked, suspended, canceled, proven unlawful, or expire by a date or condition set forth within itself. In 38 of the 50 states, there is no requirement for orders to undergo administrative procedure, which controls how they are formed and enacted. Six states mandate legislative review, and another six have these requirements only for executive orders of a certain type, like those having to do with the creation of agencies.
Title: Executive order
Content:  With the exception of William Henry Harrison, all presidents since George Washington in 1789 have issued orders that in general terms can be described as executive orders. Initially, they took no set form and so they varied as to form and substance. The first executive order was issued by Washington on June 8, 1789; addressed to the heads of the federal departments, it instructed them "to impress me with a full, precise, and distinct general idea of the affairs of the United States" in their fields. According to political scientist Brian R. Dirck, the most famous executive order was by President Abraham Lincoln, 
Title: President of the United States
Content:  manage the growing federal bureaucracy, presidents have gradually surrounded themselves with many layers of staff, who were eventually organized into the Executive Office of the President of the United States. Within the Executive Office, the president's innermost layer of aides (and their assistants) are located in the White House Office. The president also possesses the power to manage operations of the federal government by issuing various types of directives, such as presidential proclamation and executive orders. When the president is lawfully exercising one of the constitutionally conferred presidential responsibilities, the scope of this power is broad. Even so, these directives are subject to judicial review by U.S. federal courts, which can find them to be unconstitutional. Moreover, Congress can overturn an executive order via legislation (e.g., Congressional Review Act).
Title: Executive order
Content:  power independently of Congress and the scope of the War Powers Resolution remain unresolved constitutional issues, but all presidents since the passage of the resolution have complied with its terms, while maintaining that they are not constitutionally required to do so. Harry S. Truman issued 907 executive orders, with 1,081 orders made by Theodore Roosevelt, 1,203 orders made by Calvin Coolidge, and 1,803 orders made by Woodrow Wilson. Franklin D. Roosevelt has the distinction of making a record 3,522 executive orders. Joe Biden became the president to issue more executive orders in first 100 days than any other president since Harry Truman.

Question: where does the president get authority to issue executive orders?
Answer: Constitution.