A deal based on mutual trust with Iran, who is the leading exporter of terrorism in the region.
Who has Americans held prisoner (that was not discussed).

Who are responsible for killing most of the Americans killed in the Iraq war, either through training of Al Qaida/pro-Saddam resistance, through supplying the IED explosives, or through directly sending Iraq soldiers to do the fighting.

Trusting Iraq, who has broken every agreement, and has lied time and again as they've advanced their nuclear program.

Trusting Iraq, whose leader just 4 days ago was leading chants of "Death to America, Death to Israel."

Oh yeah. We should let these people get nuclear weapons.