"I think some progress was made."
"The goal of this is to keep Iran from developing a nuclear weapon."
"The decision before Congress is, is this adequate to meet that goal."
"I am really worried that if we in their minds abdicate the leadership that we have taken in this agreement..."
"My view is that there is no substitute for American leadership in the Middle East or anywhere else."
"I will, however, disagree with the notion that a U.S. presence will solve the problem."
"What we have to do is tactically use the U.S. military to help the right people and move things in the right direction."
"We need to find Sunnis who are willing and able to fight ISIS and build a better alternative."
"It is not just a matter of defeating one group; it is a matter of defeating an ideology."
"I fear that strategy won't work."
"What can you do to encourage the tribes in Syria and in Iraq to turn on ISIS?"
"We could drop 200,000 U.S. troops in the middle of this; it wouldn't solve the problem."