Trump on Iran: 'Oppressive regimes cannot last forever' US President Donald Trump walks with US Coast Guard Chief Warrant Officer Gene Gibson — the commanding officer of the Lake Worth Inlet Station — during an invitation for Coast Guard service members to play golf at Trump International Golf Course in Mar-a-Lago, Florida, US, December 29, 2017. AFP/Nicholas Kamm WASHINGTON: US President Donald Trump weighed in on protests in Iran Saturday, warning that the country's people want change and "oppressive regimes cannot endure forever." Trump posted on Twitter two clips of his speech to the UN General Assembly (UNGA) in September, wherein he took aim at the Iranian regime, which Washington has held out as its top adversary in the Middle East. "Oppressive regimes cannot endure forever, and the day will come when the Iranian people will face a choice," he tweeted, quoting from the speech. "The world is watching!" Trump's posts — his second time addressing the subject in as many days — came as several hundred anti-government demonstrators clashed with police at the University of Tehran in a third straight day of protests. Hundreds of counter-protesters also massed outside the entrance to the university, chanting "Death to the seditionists" in a show of support for the regime. Videos shared by social media users outside Iran but which could not be independently verified claimed to show thousands marching peacefully against the regime in several cities including Khorramabad, Zanjan, and Ahvaz, with chants of "Death to the dictator!" "The entire world understands that the good people of Iran want change, and, other than the vast military power of the United States, that Iran's people are what their leaders fear the most," Trump said, again quoting from the UN speech. Trump also tweeted in support of the protesters late Friday, prompting Iran's foreign ministry spokesman Bahran Ghasemi to dismiss his remarks as "opportunistic."