Who was the US president that signed the first nuclear deal with Iran in 2015?

The US president who signed the first nuclear deal with Iran in 2015 was Barack Obama. This agreement, known as the Joint Comprehensive Plan of Action (JCPOA), was a significant diplomatic achievement aimed at curbing Iran’s nuclear program in exchange for the lifting of economic sanctions. The deal involved extensive negotiations with Iran and other world powers, including the other permanent members of the UN Security Council and Germany. Its primary goal was to ensure that Iran did not develop nuclear weapons, using measures such as limitations on uranium enrichment and rigorous inspections by the International Atomic Energy Agency (IAEA). The JCPOA highlighted a key moment in diplomatic relations between the US and Iran, marking a departure from the previous policies of sanctions and hostility.