On CNN Tuesday morning, former New York City Mayor Rudy Giuliani suggested that President Obama should have bombed Syria without congressional authorization.

Giuliani said Obama "mishandled" the situation in Syria, calling it the greatest mishandling of foreign policy by a president in his lifetime.

CNN host Chris Cuomo pushed back against Giuliani's statement, pointing out that Obama wanted military action in Syria but was met with resistance from Congress.

"He could have anyway, he did before," Giuliani said with a chuckle. "He bombed before without congressional authorization, Bush bombed — Clinton bombed without congressional authorization."

Giuliani added that he was astonished that Secretary of State John Kerry and Obama were lecturing Russia for blocking the peace process after giving them the upper hand in the negotiations.