Trump says US will intervene if Iran starts killing protesters: ‘Locked and loaded’

President Donald Trump warned early Friday that the U.S. would intervene if Iran started killing protesters. 

Writing on Truth Social, the president said if Iran shoots and "violently kills peaceful protesters, which is their custom, the United States of America will come to their rescue." 

"We are locked and loaded and ready to go," Trump said. 

Trump’s warning comes as demonstrations triggered by Iran’s deteriorating economy expand beyond the capital and raise concerns about...