2. President Trump returned from an official state visit to Japan that he marked by politics at home rather than diplomacy abroad.

The president’s main interest was not where his hosts had tried to direct it — to security and trade in Asia — but on fighting with his perceived political enemies in Washington, our reporter writes in an analysis.

One target of Mr. Trump’s ire: His national security adviser, John Bolton, whom Mr. Trump publicly undercut on Iran and North Korea. The rift raises questions about the administration’s policies on both long-term American adversaries.