The draft Senate resolution that would authorize military action in Syria explicitly bans American troops in the country, but Hayden said that can’t be guaranteed.
“This shows the difficulty of trying to craft language that's going to satisfy everyone. At the end of all this, there's just going to have to be some faith and confidence between the president and Congress," Hayden told CNN’s Jake Tapper.
Hayden said the desire for the Syria action to be “one and done” ignores that fact that allies of Syria are likely to respond to a U.S. intervention.
“Assad, and his Iranian and Hezbollah allies are going to want to show resolve, too, they're not going to want to give the United States a free ride for this kind of action.”
Hayden directed the CIA from 2006 to 2009. Before that, he directed the National Security Agency. He’s now a principal at risk management firm Chertoff Group.