The True-State Solution

Follow the map the British drew in 1922, which put Arab and Jewish Palestine across the Jordan River.

The Trump administration has offered tantalizing clues about its forthcoming “Deal of the Century” for Mideast peace. It could be a bold new concept—replacing the failed “two-state solution” with a Jordan-Israel confederacy, in which Jordan would be recognized as the Palestinian state. Call it the true-state solution.

Palestinians have always been the majority in Jordan, though they haven’t been treated as such since its creation as a British-appointed Hashemite monarchy in 1921. The true-state solution would enfranchise the...