Sen. Rand PaulRandal (Rand) Howard PaulGOP senator asks to be taken off Moore fundraising appeals Red state lawmakers find blue state piggy bank Prosecutors tell Paul to expect federal charges against attacker: report MORE (R-Ky.) is using President Obama’s own words against him in an amendment designed to make sure the White House doesn’t strike Syria without congressional approval.

Paul’s sense of the Senate amendment states that Obama would be in violation of the Constitution if he acts without winning congressional approval.

It quotes an interview Obama gave in 2007 to The Boston Globe to underline its point.

“Senator Barack ObamaBarack Hussein ObamaOvernight Cybersecurity: What we learned from Carter Page's House Intel testimony | House to mark up foreign intel reform law | FBI can't access Texas shooter's phone | Sessions to testify at hearing amid Russia scrutiny Russian social media is the modern-day Trojan horse Trump records robo-call for Gillespie: He'll help 'make America great again' MORE stated correctly to the Boston Globe in 2007 that the ‘President does not have the power under the Constitution to unilaterally authorize a military attack in a situation that does not involve stopping an actual or imminent threat to the nation’” Paul’s amendment reads in part.

At the time, Obama was making the case that the Bush administration had no legal standing to unilaterally attack an Iranian regime violently opposing a civilian uprising.

The president has asked Congress to authorize a strike against Syria over its alleged use of chemical weapons. The administration says it has proof that a Syrian chemical attack killed more than 1,400 people. It argues it is in the U.S. national interest to punish Syria for the attack to discourage future use of chemical weapons.

It is unclear what Obama will do if Congress does not approve a military strike.

He has said he believes he would have the power to act alone, but doing so would be politically difficult.

On Tuesday, Secretary of State John KerryJohn Forbes KerryKerry: Trump's rhetoric gave North Korea a reason to say 'Hey, we need a bomb' Russian hackers targeted top US generals and statesmen: report Trump officials to offer clarity on UN relief funding next week MORE told the Senate Foreign Relations Committee that the president has the power to act “no matter what Congress does.”

Paul, who is reportedly considering a filibuster of the Senate resolution to act in Syria, declares in his amendment that Obama would be in violation of the Constitution if he acts without congressional approval.

“It is the sense of Congress that if the authorization fails to pass Congress, the President would be in violation of the Constitution if he were to use military force against the Government of Syria,” the amendment continues.