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Iran now appears to be next on President Donald Trump’s list, after Venezuela and Greenland.

The backdrop is a wave of protests in Iran, now in their third week. What began as demonstrations over a sharp jump in inflation has evolved into nationwide, anti-government unrest. More than 500 people have been killed as Iran’s government moved aggressively to suppress dissent, according to the U.S.-based Human Rights Activists News Agency.

Trump weighed in Friday with a Truth Social post declaring that “the United States of America will come to their rescue,” referring to the protestors.