If the customer has an outstanding margin loan against the securities of $50,000, his equity will be $10,000 ($60,000 - $50,000 = $10,000). The broker determines the customer should receive a margin call for $5,000 ($15,000 - $10,000 = $5,000).
War Powers. Congress holds the power to declare war. As a result, the president cannot declare war without their approval. However, as the Commander in Chief of the armed forces, many presidents have sent troops to battle without an official war declaration (ex. Vietnam, Korea).
The War Powers Resolution concedes that the President should have the flexibility to deploy military forces before seeking congressional authorization, but then goes on to list the reasons the President can use force, and the law also allows Congress to disapprove of such actions after 60 days.