Democrats clinch key votes on Iran nuclear deal

Aired: 9/8/2015 | 0:06:41 | Clip
Three remaining Senate Democratic holdouts announced they will back the Iran nuclear deal, bringing the number of supporters to at least 41 votes. That's enough to block majority Republicans -- who unanimously oppose the deal -- from disapproving the agreement. Political director Lisa Desjardins joins Gwen Ifill from Capitol Hill to take a closer look.