New probe into Biden health 'cover-up'

US President Donald Trump on Wednesday ordered an investigation into what Republicans claim was a “conspiracy” to cover up Joe Biden's declining cognitive health during his time in the White House.

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The move, which was slammed by Mr Biden, is the latest in a long-running campaign by Mr Trump — with the backing of Republican Party politicians and their cheerleaders in the conservative media — to discredit his predecessor.

But it also comes as a growing chorus of Democrats begin to acknowledge the former president appeared to have been slipping in recent years.

Those concerns were thrown into stark relief by a disastrous debate performance against Mr Trump during last year’s presidential campaign, in which the then-81-year-old stumbled over his words and repeatedly lost his train of thought.

“In recent months, it has become increasingly apparent that former President Biden’s aides abused the power of Presidential signatures through the use of an autopen to conceal Biden's cognitive decline,” a presidential memorandum issued Wednesday reads.

“This conspiracy marks one of the most dangerous and concerning scandals in American history.