India, April 19 --  A conversation is said to be taking place in Washington right now that almost nobody in power is willing to have publicly. It is whispered in corridors, traded among senior officials, and increasingly voiced by foreign policy analysts who have spent decades studying how American power actually functions. The question is simple, devastating, and urgent: "Is the President of the United States mentally fit to govern?" This is not a partisan attack dressed up as concern. It is a serious question that the moment demands, and the evidence demanding it comes not from opposition research or late-night commentary, but from the president's own unfiltered, unmediated, middle-of-the-night output.

Consider what we have witnes...