Kentucky Republican Rand Paul introduced a resolution Wednesday in the U.S. Senate declaring war against the Islamic State.
Paul said he believes the president should have come to Congress before authorizing military action against the terrorist group.
"Our founding fathers wanted to make it difficult to go to war," explained Paul. "They wanted to have the authority of Congress, you had to have some consensus from the public at large before going to war, and they didn't give the power unilaterally to the president. The president for the last four or five months has been acting illegally and unconstitutionally."
The U.S. began air strikes in Iraq and Syria a few months ago. Senator Paul argues the current war must be made valid or be ended.
The Bowling Green Republican says he does support a military campaign against ISIS, claiming the American embassy and consulate are threatened.