That explains the last election!
The CDC is completely full of shit on this issue. Most of what the CDC is calling "mental illness" is just normal everyday life for everyone on this planet.
What's scary is this gives the government an excuse to declare anyone it chooses to be mentally ill and then restrict their freedom. Also note the CDC's mention of "Mental Illness Surveillance Among U.S. Adults".
This will inevitably find it's way into gun control.