Joe Biden doesn't have the mental sharpness it takes to serve effectively as the president — opined six in 10 Americans, according to a recent poll.<br /><br />What Happened: Only 32 percent of Americans said that Biden has the mental sharpness to serve effectively as the president, according to the Washington Post-ABC News Poll. <br /><br />Biden is 80 years old, while his predecessor Donald Trump, who is vying for the Republican nomination in the 2024 presidential elections, is 76 years old.<br /><br />In contrast, 54% of those polled say that Trump has the mental alacrity to serve in the White House.
