Iran war panel roundup: What has the US gained, and why send more troops?

Even as regional leaders scramble to find diplomatic off-ramps to the war, the main players – Israel, the US and Iran – are doubling down on their positions. President Donald Trump has claimed Iran is almost ready for a deal, as Tehran warns it will “rain fire” on American troops if they launch a ground invasion. As the Iran war enters its fifth week, here's a roundup of CNN panelists debating key topics related to the war.