It was amazing to me Iran would negotiate with the USA in the first place.

The USA needs to value this opportunity to invoke peace with Iran over a period of time. The Middle East has no room for aggression or rhetorical hate speech.

...July 1988 Iran and Iraq (click here) were in the midst of a war that included attacks on each other’s oil tankers in the Persian Gulf. The United States was among several countries that had warships in the area to safeguard the transport of oil. Various incidents, notably an attack on the USS Stark involving Iraq missiles in May 1987, had resulted in a revision to the U.S. rules of engagement, allowing U.S. ships in the Persian Gulf to undertake more protective measures.On July 3, 1988, the USS Vincennes, under the command of Capt. William C. Rogers III, was involved in several skirmishes with Iranian vessels. According to various reports, Rogers, who had a reputation for aggressiveness, ignored orders to change course and instead continued to pursue the enemy gunboats.

Against this background, the Iranian airliner, an Airbus A300, departed from Bandar-e ʿAbbās, Iran, at approximately 10:47 am, headed to Dubai, United Arab Emirates. Crewmen aboard the Vincennesimmediately began tracking Iran Air flight 655, which had taken off from an airport used by both military and commercial aircraft. For the next several minutes, there was confusion aboard the U.S cruiser over the identity of the aircraft, which was eventually determined to be a much smaller F-14 fighter jet. After several warning calls went unheeded, the Vincennes fired two surface-to-air missiles at 10:54 am, destroying the plane and killing all those on board....

The so-called "Iran Deal" won't dissolve because it is toyed with for politics in the USA. Russia and Europe will continue their relationships with Iran while the monitoring regarding the dismantling of it's nuclear facilities go forward.

Decertifying the Iran Agreement will put the USA in a very precarious position with allies today and in the future. That should not occur.