India, June 7 -- Billionaire hedge fund manager Bill Ackman on Friday questioned incumbent President Joe Biden's mental acuity and physical capabilities forWhite House rerun, stating that the US presidential election is "not a family wedding where we can make light of grandpa's declining faculties".

Ackman was responding to a video shared on X, formerly Twitter, by advocate Chris D. Jackson. The clip comes as a clarification after Biden faced mockery for suffering an "embarrassing" moment while sharing a stage with French President Macron and his spouse Brigitte Macron, as well as US First Lady Jill Biden at a D-Day memorial in France.

With a caption reading "Awkward" and a cringe emoji, Republican Party's official RNC Research on Thurs...