Over the last few weeks, Chairman of the Joint Chiefs Gen. Dan Caine has privately made clear to other top Trump advisers that the US needs to find an off-ramp from the war with Iran — because the military options on the table to escalate the conflict could backfire and airpower alone is unlikely to achieve President Donald Trump’s stated objectives, according to three sources familiar with the matter. CNN’s Julia Benbrook reports from New Jersey, where the president is spending the weekend.