U.S. President Donald Trump and Republican lawmakers offered implicit support on Sunday to tens of thousands of Iranians protesting the Islamic Republic's unelected clerical elite and Iranian foreign policy in the Middle East.

"Big protests in Iran," Trump said in a tweet from his private club in Palm Beach, Florida. "The people are finally getting wise as to how their money and wealth is being stolen and squandered on terrorism.

"Looks like they will not take it any longer. The USA is watching very closely for human rights violations!"