WASHINGTON, Feb. 1 (Xinhua) -- U.S. President Donald Trump said Sunday that if Tehran fails to strike a nuclear deal with Washington, "we will find out" whether Iranian Supreme Leader Ali Khamenei was right to warn that a U.S. attack could ignite a regional war.
Khamenei said at a meeting in Tehran earlier on Sunday that if the United States starts a war against Iran, "it will be a regional war." ■
