Josh Marshall has you covered, at least until more is known.

This paragraph says volumes, imo, about the nature of right-wing objections:

There’s a lot of Iran pony thinking going on about what would be cool if we could have everything we want. But as much as I fear what a Republican president might do on the Iran front, I think going to war with Iran is highly unlikely. Stiffening sanctions won’t happen because even if we stiffened sanctions, Europe and Russia and China won’t. So all the folks saying it’s not good enough or it’s a disaster or whatever else are basically saying we should hang tough and let the Iranians do whatever they want. Indeed, adopt a maximal line of confrontation short of war, which will empower hardliners and make it more likely the Iranians will take the step from being a nuclear threshold state to an actual nuclear weapons state. It is the elevation of self-satisfaction over tangible results and reality.

Remember that the Republicans whining about this deal would likely whine about ANY deal with Iran that didn’t include the enthusiastic religious conversion of every single man, woman, and child in Iran to Presbyterianism. They’re incapable of looking at anything generated by this Administration and not dismissing it as un-American, anti-Christian, and possibly socialist, even when the plan in question was written by Republicans in the first place, so it’s not as though these people are arguing in good faith.