Americans actually agree on something in this time of discord: Joe Biden is too old to be an effective president in a second term. Only a few years his junior, Donald Trump raises strikingly less concern about his age. But they have plenty of other problems with Trump, who at least for now far outdistances his rivals for the GOP nomination despite his criminal indictments. Never mind his advanced years—if anything, some say, the 77-year-old ought to grow up. A new poll from the Associated Press-NORC Center for Public Affairs Research finds much of the public oddly united in sizing up the one trait Biden cannot change: