Consider a topic (mental health, HIV, opioid epidemic, pandemics, obesity, prescription drug prices, or many others) that rises to the presidential level. How did the current and previous presidents handle the problem?

Consider a topic (mental health, HIV, opioid epidemic, pandemics, obesity, prescription drug prices, or many others) that rises to the presidential level. How did the current and previous presidents handle the problem? What would you do differently?