FROM OUR NORTH AMERICAN EDITOR SINEAD WHEELER-DEALER IN WASHINGTON, DC

WE’VE SEE BLACK Power and Girl Power and Gay Power; well now it’s definitely the age of Grey Power.

As the US Presidential election heats up, there’s only one issue that counts any more: does the candidate have all his marbles and will he have them in four years time?

The Hur Report on current incumbent Joe Biden has been less than flattering about the President’s brain. Mr Biden’s continuing soap opera of speaking gaffs and occasional stumbles has not helped his cause. Nonetheless, where there’s a pulse, there’s still – potentially – a President.

On the other side, we have The Donald, a man for whom normal unhinged would see not to be satisfying enough. His first term might simply have been a Twitter marketing campaign. A second promises to be an entire series of LA Law, The Practice and Better Call Saul combined. Where is Alan Shore when you need him?

Mr Trump’s mind is a PhD thesis all of its own. But he does have energy. Buckets of it. Perhaps because inside Mr Trump is a very spoiled child trying to get out.

Joe Biden is 81 starting to look 90. Donald Trump is 77 going on 6. It is possible dementia struck him early in life and no one noticed. Should he be elected, he will be Joe Biden’s age when – or should one say if – he finishes his term. You may read that from both sides. Biden will be 85, if re-elected, when he finishes in office. Which may make his choice of Vice President the key factor in this fight. Then again, Mick Jagger is still strutting his stuff to adoring fans and he’s 81 this year. And Paul McCartney is as old as Biden. Ringo, older.

The lesson: this is a grey world, suck it up Yoof, your time is over. And whoever gets into the White House, Biden, Trump or neither, the problems remain the same.