Updated

A new poll puts US President Donald Trump's approval rating at 33 percent, the lowest of his presidency, with the prolonged war against Iran and high gasoline prices cited as the main drags on public sentiment. Only about one in five Americans said they believed the conflict has been worth it, while roughly 80 percent expect US involvement to continue for a prolonged period. The numbers land as Trump has rejected an extension of the expired US-Iran memorandum of understanding and publicly demanded that Tehran raise "the white flag of surrender." The souring domestic mood introduces a political constraint on the administration's escalation strategy, as economic costs of the war — particularly at the pump — become more visible to American voters.