Informal Powers of the President. Along with his/her formal powers given by the Constitution, the President also has various informal powers. They include: setting and enacting a legislative agenda, executive orders, sending out troops without a declaration of war, and conducting foreign policy initiatives, among others. The President's informal powers are not specifically written out in the Constitution, hence why they are called informal.. These powers are similar to the necessary and proper powers of Congress because they both are used in unique circumstances.