US President Donald Trump said on Wednesday that Iranian opposition figure Reza Pahlavi “seems ‍very nice” but expressed uncertainty over whether Pahlavi would be able to muster support within Iran to eventually take over.In an exclusive Reuters interview in the Oval Office, Trump said there is a chance Iran’s clerical government ‍could collapse, blamed Ukraine President Volodymyr Zelenskyy for the stalemate in negotiations with Russia over the war in Ukraine, and dismissed Republican criticism of a Justice Department probe of Federal Reserve Chairman Jerome Powell.For all the latest headlines, follow our Google News channel online or via the app.Trump has repeatedly threatened to intervene in support of protesters in Iran, where thousands of people have been reported killed in a crackdown on the unrest against clerical rule. But he was reluctant on Wednesday to lend his full support to Pahlavi, the son of the late shah of Iran, who was ousted from power in 1979.“He seems very nice,