Michael McCaul actually said...

Sanctions by the United States alone are very limited effectiveness.

Sanctions with a regime that does not seem to care about what happens to its people are very difficult and all indications suggest that the ...

We can't afford a bad deal that will threaten our allies and our interests, and we must be prepared to walk away, if necessary.

We remain confident that 4 months from now our sanctions will continue to bite and Iran's economy will remain under great stress.