Donald Trump is on his way to the Middle East this weekend to oversee the implementation of a ceasefire deal that may prove to be either his signature diplomatic achievement or just one more false dawn in the long Israeli-Palestinian conflict.

The U.S. President has hailed his 20-point plan for Gaza as pointing the way to a “Strong, Durable, and Everlasting Peace,” bringing an end to more than two years of devastating war that spread at times to Lebanon, Syria, Iran and Yemen.

But there are widespread concerns about the lack of detail in Mr. Trump’s vision, which offers no long-term political solutions for Gaza. Both Israeli Prime Minister Benjamin Netanyahu and the surviving Hamas leaders, however, appear to have concluded that appeasing Mr. Trump by going along with his plan is the best course for now.

The ceasefire formally took hold at noon Jerusalem time Friday, after the Israeli cabinet approved the implementation of the first phase of Mr. Trump’s plan. That announcement was followed by a redeployment of Israeli troops within the Gaza Strip.