2. President Trump may be willing to ease U.S. demands on North Korea, at least for now.

Mr. Trump and the North Korean leader, Kim Jong-un, exchanged fiery threats in 2017, but in the second round of talks, the president wants a deal — and appears to be willing to shift his administration’s goals to reach one, from immediate dismantlement of the North’s arsenal to limits on its size and reach. Above, Mr. Trump arriving in Hanoi, Vietnam, on Tuesday.

The two leaders will have dinner together on Wednesday night (which is early Wednesday Eastern Time), and then a formal one-on-one meeting. Here’s what’s at stake.

In an Op-Ed essay, Susan Rice, the national security adviser under President Barack Obama, sees hope for progress if Mr. Trump empowers the administration’s new envoy for North Korea, Stephen Biegun.