Explainer · White House

Executive Orders vs. Laws: What a President Can and Can't Do Alone

Last reviewed: September 26, 2026

Short answer: A law is passed by both chambers of Congress and signed by the President (or enacted over a veto). An executive order is a written directive from the President to the executive branch. It can carry legal force only if it rests on the President’s own constitutional powers or on authority Congress has delegated. A later President can revoke it, Congress can nullify orders based on powers it delegated, and courts can strike down orders that exceed the President’s authority.

What an executive order is

The Office of the Federal Register describes it this way: “The President of the United States manages the operations of the Executive branch of Government through Executive orders.” After the President signs an order, the White House sends it to the Office of the Federal Register, which numbers each order consecutively and publishes it in the daily Federal Register.

No statute broadly defines the term. The Congressional Research Service (CRS) quotes one scholar: “American law provides no definition of executive orders.” Presidents also issue proclamations and memoranda, which CRS describes as other forms of presidential directive.

Where the authority comes from

CRS explains that executive orders “typically convey presidential directives intended to have the force and effect of law,” but to have legal effect they must be issued under one of two sources: Article II of the Constitution or a delegation of power from Congress. Article II begins, “The executive Power shall be vested in a President of the United States of America,” makes the President “Commander in Chief of the Army and Navy,” and directs that “he shall take Care that the Laws be faithfully executed.”

That last clause cuts both ways. The President carries out the laws; Congress writes them. How Congress writes them is covered in how a bill becomes law.

The limits: the steel-seizure case

The leading case is Youngstown Sheet & Tube Co. v. Sawyer (1952). During the Korean War, President Truman ordered the seizure of most of the nation’s steel mills to head off a strike. CRS summarizes the holding: the Court reasoned that the President’s authority to issue the order, “if any, must stem either from an act of Congress or from the Constitution itself,” and because no statute or constitutional provision authorized it, the order was effectively a legislative act and violated the separation of powers.

Justice Robert Jackson’s concurrence set out three categories that courts still use:

• With Congress: when the President acts with express or implied authorization from Congress, his authority is at its maximum.
• Silence: when Congress has neither granted nor denied authority, there is a “zone of twilight” where the two branches may share authority.
• Against Congress: when the President acts against the expressed or implied will of Congress, his power is at its “lowest ebb.”

How recent rulings police executive power

• West Virginia v. EPA (2022): in a major questions case, the Court said an agency “must point to ‘clear congressional authorization’ for the power it claims.”
• Loper Bright Enterprises v. Raimondo (2024): the Court overruled the Chevron doctrine of deference to agencies’ readings of ambiguous statutes, holding that courts must use their own independent judgment.
• Learning Resources, Inc. v. Trump (2026): the Court held that the International Emergency Economic Powers Act does not authorize the President to impose tariffs. See how tariffs work.

How an order can be undone

According to CRS, “a later President can, generally, revoke or modify any previously issued executive order,” and Congress “may nullify the legal effect of an executive order issued pursuant to power that it delegated to the President.” Courts can also block orders that exceed the President’s authority or violate other parts of the Constitution. More on the judiciary’s role: how the Supreme Court decides cases.