Chief of State
"war power" The right for a government to protect itself is the single greatest authority given to a national government.
Dadabhai naoroji
His thunderbolt, which was given to him by the Cyclopes in appreciation for releasing them from the dungeon in Tartarus.
The boys develop a conch shell as a symbol of authority on the island. The person holding the conch shell has the right to speak during meetings and is given authority to be heard by the rest of the group.
The President alone has this authority. This is given to him under Article I and II of the Constitution.
The President of the Senate (Vice President of the United States) is given that authority in the US Constitution.
Veto or approve legislation
This is referred to as "Separation of Powers". The Legislative Branch is given authority over one task, while the Executive Branch (or the president, in your case) is given authority over another.
It was awarded on February 25, 2010 by President Obama.
President Kennedy said "Let's just keep him", referring to the turkey he was given by The National Turkey Federation and the Poultry and Egg National Board.
The President was given the authority and funds to take any actions that he saw fit to make Indians more civilized.
The President of the Senate (Vice President of the United States) is given that authority in the US Constitution. He may choose not to vote which would have the same effect as voting nay.