Trump's tweet came shortly after US Secretary of State Mike Pompeo delivered his own blistering speech on Iran's leaders, accusing the clerics that rule the country of using the country's revenue to line their own pockets and fund terrorism at the expense of average Iranians.

"To the regime, prosperity, security, and freedom for the Iranian people are acceptable casualties in the march to fulfill the Revolution," Pompeo said Sunday night at the Ronald Reagan National Library in Simi Valley, California.

"The level of corruption and wealth among regime leaders shows that Iran is run by something that resembles the mafia more than a government."