Trump supporters who backed his promise to avoid new Middle East wars worry Iran’s attacks on shipping are pushing the U.S. toward escalation — and maybe even boots on the ground.When the U.S. started firing Tomahawk missiles at Iran late last month, many of President Donald Trump’s allies hoped it would be a quick, surgical operation, similar to last year’s strike against Iran’s nuclear facilities or the ouster of Venezuelan dictator Nicolás Maduro in January. Though uneasy, they were reassured by the belief that Trump’s open-ended objectives gave him the flexibility to declare victory whenever he saw fit. Now, more...