 A new survey from the Pew Research Center underscores how concerned Americans have become about Biden's mental acuity and Donald Trump's mean-spiritedness and dishonesty. It's Biden's own supporters who are largely driving the decline. About 8 in 10 Biden supporters described him as mentally sharp in 2020, while only half do now. But compared to Trump, Biden is more likely to be seen by voters as somebody who cares about the needs of ordinary people and is honest.