US First Lady Jill Biden has been blasted as “guilty of elder abuse” with questions over Joe Biden’s mental readiness to run for president continuing to pile up. Speaking to GB News, Erik Prince – former Navy Seal, founder of private military company Blackwater and founder of cyber-security company Unplugged – said the president was “clearly mentally unfit” as he backed Donald Trump to win this year’s election. Prince had spoken to Nigel Farage about Biden’s fragility, and explained in a later interview that the Democrats may have to step in over mental health concerns. He said: “If the Democr…