Which president traded weapons for hostages in Iran?

President Ronald Reagan was involved in a controversial operation known as the Iran-Contra Affair, where weapons were secretly sold to Iran, which was then under an arms embargo, in exchange for the release of American hostages held by Hezbollah in Lebanon. This operation was conducted without the approval of Congress and led to significant political scandal and investigations. Reagan and his administration maintained that the strategy was to secure the release of hostages and improve relations with Iran.