House Democrats will play a key role in whether the Obama Administration can get a deal with Iran. Under the Corker-Cardin deal on the Corker Congressional review legislation, if a third of the House or a third of the Senate were willing to sustain a Presidential veto of Congressional legislation against the deal, that would be sufficient to block Republican efforts to kill the deal.
There are those who oppose negotiations across the board, including on Iran and on Palestine. The Israeli govt. has had a deep policy of non-negotiations since its inception. Grayson says he wants a deal that enables peace. Then hold Netanyahu responsible for being a non-negotiator who needs a destabilized region to achieve objectives.