Iranian officials warn Trump not to cross red line over threats to intervene in protests

US presidents posts that US will come to the rescue of protesters prompt warnings of regret-inducing responseDonald Trump has threatened to intervene in Iran if its government kills demonstrators, prompting warnings from senior Iranian officials that any American interference would cross a red line.In a social media post on Friday, Trump said that if Iran were to shoot and kill protesters, the US would come to their rescue. He added we are locked and loaded, and ready to go, without explaining w...