I don't know though, if it will hurt him. Probably the opposite.
Nuclear deal was one of few things that Obama did right, but Iran and the deal is highly unpopular 
That's probably because people don't really understand foreign policy in-depth or the complexities of the Iran-nuclear situation. We vote for someone to handle this for us for a reason. Honestly, people shouldn't really be rushing to judgement on these types of decisions because frankly, not only do most folks not have the necessary knowledge in international affairs to truly understand it, but they are not privy to the same information that Obama is, and thus can't really make a sound decision without the facts.
There is no way to stop Iran from getting a nuclear weapon at this point. Technology is progressing to the point where proliferation will be a serious, unstoppable issue. It's unrealistic to think we can somehow prevent any country we want from going nuclear when the designs, materials and necessary know-how have gone global. All we can do is slow them down,
which is what Obama did.
