Media critic and former ombudsman Margaret Sullivan has some thoughts on the media pile-on: It’s possible for two conflicting ideas to be true at once. And so it is with the mainstream media’s unrelenting focus on Joe Biden’s mental acuity, following his terrible debate performance earlier this month. First truth: the president’s stumble and the political fallout that followed is a huge, consequential news story that deserves a lot of coverage. Second truth: the media coverage is overkill – not only too much in quantity and too breathless in tone, but also taking up so much oxygen that a story even more important is shoved to the back burner. That bigger story, of course, is the former president’s appalling unfitness for office, not only because he tried to overturn a legitimate election and is a felon, out on bail and awaiting sentencing, but because of things he has said and done in very recent weeks. As just one example, he claimed that he doesn’t know anything about Project 2025, the radical rightwing plan hatched by some of his closest allies to begin dismantling our democracy if he wins another term. Trump’s disavowal is a ridiculous lie, but I doubt most members of the public know anything about it, nor do they likely know much – if anything – about Project 2025. But anyone following mainstream media coverage could not miss knowing about the latest polls on whether Biden should step aside, how Kamala Harris would fare in a head-to-head competition with Trump,…