Final answer:
The ability to issue decrees carrying the force of law is a special presidential power known as an executive order. Issued unilaterally, these orders allow a president to enact policy goals, particularly in times of war or national security concern.
Step-by-step explanation:
The ability to issue decrees that carry the force of law is a special presidential power known as an executive order. This unilateral power utilized by presidents permits them to create rules that legally bypass Congress, albeit they can still be overturned by the courts. Instances of executive orders have typically occurred in times of war or national security concern, granting presidents the authority to direct governmental agencies and establish policy aims. Some famous examples include Franklin Roosevelt's order sanctioning the internment of Japanese Americans in 1942 and Harry Truman's order desegregating the armed forces in 1948. Additionally, it's worth noting that while executive orders can rapidly enact change, they lack the longevity of laws passed by Congress as they can be overturned in court or repealed by subsequent presidents.
Learn more about executive order