WASHINGTON — When US President Donald Trump launched the war with Iran in late February, he initially forecast it would last four to five weeks. Six months later, there’s still no off-ramp in sight despite Trump’s repeated assertions that the war has been won or a deal to resolve it was nearly complete.

A June memorandum of understanding designed to pave the way to end the war has fallen by the wayside.

US stockpiles of key weapons have diminished and the Trump administration has pivoted to pressuring Iran economically rather than launching more strikes.

As the shape of the war has morphed over the last half year, so have the goals for the conflict.

One of the prime goals now — reopening the Strait of Hormuz — was not one of Trump’s original objectives. The waterway had been a vital shipping lane through which about 20 percent of the world’s oil passed.