The 46th US president sought to counter these claims at his first press conference last week, saying he had not ruled out running for a second term, fate permitting.
A top US commentator believes that Mr Biden’s haste in implementing his policy agenda is more a reflection of his political experience gained over many years, rather than an admission of weakness.
Frida Ghitis, a world affairs columnist, argued that time has given the oldest US President in history a sense of perspective that few younger politicians possess.
In an op-ed for CNN, she wrote: “At 78, Biden is the oldest president in US history.
“He may also be one of the most introspective.
“One of the changes that comes with age is the growing realization that your time is limited.
“It’s not just a political consideration – it is a metaphysical and spiritual one.
“It’s about restoring respect for the values the US has sought to advance, however imperfectly, from its founding days: equality, freedom, and an abiding faith in democracy – all of which were eroded in the past four years.”
She concluded: “Biden is a man driven. He is not just seeking the approval of today’s voters.
“He’s trying to shape the country in a way that will change the course of history – with lasting reverberations long after he’s gone. To do that, he has no time to waste.”