Final answer:
During a national emergency, presidential powers can change. The president has implied powers in times of emergency, allowing them to act unilaterally. However, the extent of these powers can also depend on Congress's decision.
Step-by-step explanation:
During a national emergency, presidential powers can change. The president has implied powers in times of national emergency, allowing them to act unilaterally to address the crisis. For example, presidents such as Abraham Lincoln and George W. Bush asserted an implied power to temporarily suspend habeas corpus in times of national emergency, like the Civil War and the aftermath of the September 11, 2001 attacks.
Additionally, presidents can make use of their unilateral powers, such as executive orders and signing statements, to address the emergency. Presidents have also relied on an expansive definition of war powers to act unilaterally at home and abroad.
It is important to note that the extent of presidential powers during a national emergency can also depend on Congress's decision. In some cases, Congress may grant additional powers to the president, while in other cases, Congress may limit or curtail the president's powers.