Final answer:
All bills Congress passes require the president's signature before they become law.
Step-by-step explanation:
All bills Congress passes require the president's signature before they become law. The president has the power to either sign the bill or veto it. If the president signs the bill, it becomes law. However, if the president vetoes the bill, it can still become law if Congress can gather enough support to override the veto.
Learn more about the requirement of the president's signature for bills to become law