Discuss two ways in which the executive branch is a source of law

What will be an ideal response?

The executive branch is a source of law in the following ways:
Treaty Making: The president has the power, subject to the advice and consent of the Senate, to make treaties. These treaties become the law of the land, on the basis of the Supremacy Clause of the U.S. Constitution (Article VI), and supersede any state law. When President Carter entered into a treaty returning the Panama Canal Zone to the nation of Panama under certain conditions, it became the law of the land, and the treaty provisions superseded any federal or state laws inconsistent with the treaty.
Executive Orders: Throughout history, the president has made laws by issuing executive orders. For example, President Reagan, by virtue of an executive order, ruled that all executive federal agencies must do a cost-benefit analysis before setting forth a proposed regulation for comment by interested parties. The executive order as a source of law is also used by state governors to deal with emergencies and budget functions. Often, a governor will call out the National Guard or, in some states, implement particular aspects of the budget by executive order.