Biden's big test at the Nato summit in Washington

President Joe Biden will have to demonstrate next week that he still has what it takes to be the leader of the western world whem Nato leaders meet in Washington to celebrate the 75th anniversary of the alliance. Of course it's not just a jolly, it's a proper summit when Ukraine will have top billing. But every leader of Nato, including the new British Prime Minister, Sir Keir Starmer, will be coming to Washington with one thought in mind and one only. Is Biden going to have a good summit or a disastrous summit? If he walks hesistantly into the conference hall, shakes hands and calls leaders by their wrong names, or falls over, or gives an address in a quiet, croaky voice, every single person in the room is going to be worried sick that the man who represents and leads all of them can still do the job. They don't want Donald Trump back but they do want a president who looks and sounds healthy and confident and on the ball. No doubt most of the alliance leaders will gather round and give their support, slap his back (not too hard, please) and wish him well in the election. But all of them will be worried. So instead of a celebration of 75 years since the founding Washington Treaty was signed to form the western alliance, there will be trepidation and anxiety.