A day after President Trump’s bungled attempt to calm the national coronavirus jitters, the Dow Jones took a 10 percent nose dive, losing 2,352 points while America grinds to a halt with closures and cancellations announced too fast to keep up with them.

Sound and Fury: The appointment of former FBI Director Robert Mueller as special counsel to investigate Russian meddling in the 2016 election and possible Trump campaign collusion is a blow to the already-troubled presidency. It sets loose a hunting dog …