1. The summit meeting between President Trump and Kim Jong-un of North Korea is back on, and again scheduled for June 12 in Singapore.

Mr. Trump announced the date after a meeting with Kim Yong-chol, the top North Korean nuclear arms negotiator. The envoy was the first North Korean official to set foot in the White House since 2000.

But there are many roadblocks ahead. This week, the North’s state media rebuked Mr. Trump’s main strategy: dangling the promise of prosperity if North Korea agrees to denuclearize.