President Trump said that Gov. Gavin Newsom should be arrested for his governance of California, while Mr. Newsom issued a barrage of retorts online.

Disinformation spreading on social media platforms has stoked an already tense situation.

Along with a sharply downgraded projection for global output this year, it urged a “course correction” on trade to help preserve living standards.

Plus, remembering a funk legend.

One constant in President Trump’s second term is that the subjects of his quarrels are ever-changing.