Said Paul in his floor speech:
Our Founding Fathers were quite concerned about giving the power [to] declare war to the Executive. They were quite concerned that the Executive could become like a king. Many in this body cannot get boots on ground fast enough in a variety of places, from Syria to Libya to Iran. We don’t just send boots to war. We send our young Americans to war. Our young men and women, our soldiers, deserve thoughtful debate.
Before sending our young men and women into combat, we should have a mature and thoughtful debate over the ramifications of and over the authorization of war and over the motives of the war. James Madison wrote that the Constitution supposes what history demonstrates. That the Executive is the branch most interested in war and most prone to it. The Constitution, therefore, with studied care vested that power in the Legislature.