US has lost the war in Iran- Robert Kagan

Robert Kagan, US columnist and neoconservative, joins the chorus of voices that say that the US has lost the war in Iran.

The US cannot bring about the collapse of the Iran regime without extremely high costs. Kagan spells out these costs and argues that simply walking away seems the best option for Trump:

Unless the U.S. is prepared to engage in a full-scale ground and naval war to remove the current Iranian regime, and then to occupy Iran until a new government can take hold; unless it is prepared to risk the loss of warships convoying tankers through a contested strait; unless it is prepared to accept the devastating long-term damage to the region’s productive capacities likely to result from Iranian retaliation—walking away now could seem like the least bad option.

And walking away from the present situation is certainly defeat:

There will be no return to the status quo ante, no ultimate American triumph that will undo or overcome the harm done. The Strait of Hormuz will not be “open,” as it once was. With control of the strait, Iran emerges as the key player in the region and one of the key players in the world. The roles of China and Russia, as Iran’s allies, are strengthened; the role of the United States, substantially diminished

Far from being toppled or even weakened, the government in Iran is poised to emerge stronger and Iran will be a greater force in the world than in the past:

The power to close or control the flow of ships through the strait is greater and more immediate than the theoretical power of Iran’s nuclear program. This leverage will allow the leaders in Tehran to force nations to lift sanctions and normalize relations or face penalties. Israel will find itself more isolated than ever, as Iran grows richer, rearms, and preserves its options to go nuclear in the future. 

The question is how soon will President Trump bow to the reality and walk away. The longer the wait, the greater is the cost to the world economy.