U.S. President Donald Trump on Tuesday called Iran the "most destructive force" in the Middle East, blaming Tehran for instability across the region and warning that the United States will never allow it to obtain a nuclear weapon.

US President Trump, during his final remarks in Riyadh, warned Iran to abandon its support for terror and halt its nuclear ambitions or face “massive maximum pressure.” He urged allies to enforce oil sanctions and offered a conditional deal to Tehran,

"We're in very serious negotiations with Iran for long-term peace," President Donald Trump said on a tour of the Persian Gulf region.