Since 2002 until now, the Iranian nuclear program remains one of the hottest international problems despite the efforts of three US presidential administrations, which ruled during this time to solve the Iranian issue. This article analyses and compares the policy toward Iran of three US presidents George Bush, Barack Obama, and Donald Trump, discusses the positive and negative consequences of their attempts to solve the Iranian nuclear issue, and outlines the future prospects of US-Iran communication over the nuclear deal. President Trump's policy on Iran was somewhat similar to that of President Bush, both presidents rejected the policy of any concessions to Iran and focused on the policy of pressure. The US withdrawal from the JCPOA influenced not only the relations between the US and Iran, but also the relations of European countries, as since its release in 2018, Europe has tried to save the JCPOA and deter Iran from resuming its nuclear program. In general, Trump's policies not only canceled the nuclear deal, which was the result of long negotiations by the Obama administration, but also complicated further negotiations with Iran. Despite the victory of Democrat Joe Biden, who is a follower of Obama's policies, signing a new agreement with Iran may be even more difficult than it was in 2013-2015, because Iran's missile program has become even more developed, as well as distrust of international treaties as well. The article analyzes the possible consequences of Trump's policies and options for returning to dialogue and agreement. The next crucial stage in Iran-US relations is
the upcoming elections in Iran in 2021, the results of which will affect the readiness of any concessions to ease sanctions and establish a dialogue.
Key words: Iranian nuclear program, Joint Comprehensive Plan of Action (JCPOA), Nonproliferation Treaty (NPT), economic sanctions.
EVOLUTION OF US POLICY TOWARD IRAN’S NUCLEAR PROGRAM IN XXI CENTURY: FROM PRESIDENT BUSH TO PRESIDENT TRUMP