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 debate, instead, has centered on the location of the power to initiate war. Advocates of congressional power contend that the President cannot initiate hostilities because the Constitution expressly vests the power to declare War in Congress.