Richard Shelby actually said...

The Iranian threat to walk away from the negotiations if deadline-triggered sanctions are imposed is, in fact, counter-historical.

As we negotiate a comprehensive nuclear deal with Iran, we would be remiss if we did not heed the lessons from Alberto's exhaustive work.

The JPOA has not halted Iran's nuclear program.

the Administration seems to be chasing this deal, in other words, wanting a deal perhaps more than Iran wants a deal.