A very shakey Joe Biden holds forth at a press conference

All the doubts about Joe Biden's staying power were resurrected in Delhi during his press conference in Vietnam following the end of the G20 summit in New Delhi. He tried the good old folks comedy chatline routine to start with, presumably to woo the reporters into submission. But it didn't take long before his press people were beginning to look really worried. He was rambling, there is no other word for it, and he speaks so quietly even the most forgiving reporter was looking confused. Basically, after an important G20 summit when vital subjects such as Ukraine and climate-change were discussed at length, you need an American president to stand up and be counted and to tell the world exactly what he thinks and what he's going to do to put things right. But Biden was so tired he could hardly get the words out and in the end he announced he was going to bed. I think that was a relief to everyone, especially to his press secretary who as good as shut him off when she called for music to be played. Now imagine a similar type of press conference in four years' time, with Biden half way through a second term. If he's tired after a summit today, how much tireder will he sound in four years? If he is honest with himself, he must know that in a second term in office he will get progressively exhausted. That's not to say he should step down and let a younger person take his place. But you can bet an increasing number of Democrats are going to come to this view in the months ahead.