Who has the power in the United States to declare war?

A: President B: The Senate C: Secretary of state D: Congress

Congress has the power in the United States to declare war. The correct option in regards to the given question is option "D". Section 8 of Article 1 of the United States Constitution gives the Congress the power to declare war. The President of the United States has the power to direct the military as he is the Commander in Chief. The Secretary of State or the Senate has no power to declare war against any country as per the rules laid down by the US Constitution.