Add Yahoo as a preferred source to see more of our stories on Google. President Joe Biden, right, and Republican presidential candidate former President Donald Trump, left, participate in a ...

Cognitive testing is not a weapon. But you wouldn’t know that by following the last few years of American politics. Donald Trump himself got into the game. “Joe should immediately take a Cognitive ...

President Biden is facing calls to undergo cognitive testing and release the results after his disastrous debate last month, and amid a series of reports about his apparent decline in recent months.