Further, Trump let the Saudis rain hell on the Houthis. Biden stopped the Saudis and took the Houthis off the Terrorists list and later said "Woops I F##ked up" and put them back on. He is also permitting the Houthis influence of shipping through the Suez Canal. Obama gave Iran Billions of dollars that have been sent to Hamas, Houthis, and more dangerously, Hezbollah.

Good points of the Iran Nuclear deal under Obama:

Inspectors were on the ground monitoring inbound shipments, and they were permitted in some production facilities. Also Manifests originating out of Europe were reviewed and shipments inspected. The equipment to refine was also held to small numbers.

Bad points of the Iran Nuclear deal under Obama:

Much of the technology of a Nuclear threat is the delivery systems of which was not under restrictions or could be researched and designed outside of scrutiny. This includes software, electronics, guidance systems as well as the casings and rockets. Another bad aspect is they got the money. If Bush or any other President would have delivered cash in dark of night on a landing strip with pallets of money the press would have called for impeachment. one more point, everyone agreed that it would only delay the Iranians efforts to become a nuclear power.

Lastly, If Iran gets Nuclear weapons, it's a whole new world.