If we let Iran get nukes, it was inevitable that Saudi Arabia would get them, too, so that was already the Democrat plan ... and it is still a bad plan even if Trump does it.
I'm willing to say an idea of Trump is bad. Are you willing to say an idea of a Dem president is bad?
Consider: Non-proliferation was already abandoned as a strategy. Clinton failed to stop N.Korea and even gave them a reactor. Obama failed to stop Iran and even paid them and gave them a timeline for getting them. Ukraine and Libya were both punished severely for turning over their nukes. Too bad our leaders couldn't/wouldn't pull it off. Maybe non-proliferation was a pipe dream, but postponing proliferation seemed like an admirable goal that we jettisoned a bit soon.