Washington correspondent Olivia Nuzzi’s latest report is a quietly harrowing account of both a Biden fundraiser last weekend and her experience over the last several years — but especially the last several months — covering a politician who is suffering the inevitable effects of age. She looks hard at why the June 27 debate against Trump came as a shock to much of the nation. It was not a shock to her, because she had been hearing, and reporting on, recent rumblings among Biden’s elite supporters that he had fallen off significantly from even a year or two ago. She met him earlier this year and noticed a clear difference. She doesn’t offer solutions, but she makes it clear the problem had been building for some time.