What if it turns out that research suggests gun control is effective in reducing gun violence? Note, I'm not saying that it is effective; I have no dog in this fight and don't know enough. But the law effectively says to the CDC "You're allowed to research this health issue, but if you come to a conclusion that's politically unacceptable, you can't share it."

The result is that the CDC now believes any gun violence research to be likely to result in political reprisal against them come budget time.[1]

1. https://www.washingtonpost.com/news/storyline/wp/2015/01/14/...