Hiding in plain sight: Biden’s mental, physical decline on display from the start

President Biden raised eyebrows at the G7 summit in June 2021, just months into his term, with an embarrassing memory lapse that sparked laughter from fellow world leaders.

The leaders of the seven wealthiest nations had gathered in England in what was Mr. Biden’s first major meeting as president with foreign dignitaries. Mr. Biden, who was 78 at the time, publicly chided British Prime Minister Boris Johnson for not introducing the president of South Africa, even though Mr. Johnson already did so by name. 

Mr. Biden appeared confused. He bewilderedly looked around...