From The New York Times:
Opinion Columnist
More than a setback, Biden’s showing at the debate was a revelation, confirming the worst fears of his doubters. Since then, several news reports have made it clear that the Biden we all saw onstage is familiar to those who see him behind the scenes. Axios reported that, according to presidential aides, Biden is alert and engaged from 10 a.m. to 4 p.m., but not necessarily outside of those hours. The Wall Street Journal reported that European officials were worried about Biden’s “focus and stamina” even before the debate, “with some senior diplomats saying they had tracked a noticeable deterioration in the president’s faculties in meetings since last summer.” This is not a fixable problem.
We all know Biden is usually fine reading from a teleprompter. The question is whether he can think and speak extemporaneously, a low bar for a president, and one that Biden can no longer be relied on to clear.