America’s big problem is not Joe Biden, it’s the menace to democracy posed by Donald Trump | Simon Tisdall

The presidential debate was further proof of the fragility of the country's constitution. Radical reform is crucial, whoever wins in November

It wasn't so much what Joe Biden said, it was how he said it. His voice was weak and shaky, he lost his way, forgot what he was saying. He sounded feeble. He sounded old. Very old. And the storm of white-hot criticism that rained down on his head from friends and foes alike after the 2024 election's embarrassing and disastrous first presidential TV debate with Donald Trump was blistering. It was sad and painful to watch.

Republicans were jubilant. They think it's all over bar the voting. They claimed Biden had only one objective: to prove, at 81, that he was fit to lead as president for a second term - and he failed. Many Americans will agree. Except they already thought he was too old. It's unclear as yet how much this flop will sway undecided voters. Proud, stubborn Biden will fiercely resist pressure to stand down. And no leading Democrat is publicly willing as yet to wield the knife. That may change.