I was physically confronted Tuesday by aggressive, pot-smoking agitators at my Capitol Hill office. They attempted to shove open a private door, throwing their shoulders into it and injuring my wrist in the process (thank goodness not seriously). Some from the crowd were arrested. Also thankfully, my staff and innocent bystanders weren’t injured. But it could have been much worse.

This aggression, by people who disagree with my opposition to the legalization of recreational marijuana, demonstrates a growing problem with political...