No, it was only after his debate debacle that they put on the full court press. Sane folks knew he was gone LONG before that, but the media kept telling their rabid lemmings that he was very sharp despite the mountains of evidence to the contrary. The lemmings believed it, just like they believe the misquotes from Trump. They believe it all, which is what has formed a false narrative among Democrats about Trump. It was all part of a plan that backfired. They didn't realize that at some people in the country weren't so gullible.