Trump's UN address landed flat, and the fallout from his Iran war is being framed as a political disaster for Republicans heading into the midterms.

• His UN speech got no applause, including a line threatening to "annihilate" Iran unless a deal is reached.
• He insists Iran will never get a nuclear weapon, calling the country a violent threat to the world.
• Entering the war against Iran has left the U.S. with used-up munitions and interceptors and an energy crisis.
• Republicans are expected to take heavy losses in the midterms because of the war decision.
• Trump is described as driven by ego rather than any political ideology, having been a Democrat before running for president.

Outlook: The Iran conflict looks set to keep draining U.S. weapons stockpiles and weighing on energy prices, with Republicans carrying the political cost into the midterms.