Joe Biden’s campaign is facing a strategic dilemma. Since the president’s job-approval ratings have been consistently low, his path to reelection depends on making 2024 a comparative choice between himself and Donald Trump, his scary, extremist predecessor. That task is becoming more urgent as evidence emerges that a sizable number of voters either don’t remember or misremember the four turbulent years of the Trump administration. But paradoxically, educating voters about the potential consequences of a Biden defeat could annoy and alienate them by pushing Trump fatigue to new heights.