Not so long ago, the scourge of opioids seemed unstoppable. More than 400,000 Americans died from drug overdoses between 2020 and 2023. The toll was more than twice as large as that from either guns or vehicle accidents. But 2023 now appears to have been a turning point. Since then, annual overdose deaths have declined more than 25 percent, thanks partly to a creative public health campaign to expand access to treatments like Narcan and Suboxone. The crisis is finally easing. President Trump...