Based on several head-shaking instances of proposed legislation in recent years, our elected officials have been very good at displaying their lack of understanding or downright ignorance of the US Constitution. If an elected official is sworn in at the beginning of their term to "uphold the US Constitution," don't you think they should know what it says?
Proposal: Any candidate that wishes to be on a ballot for city, county, state, or federal government must demonstrate proficiency in US Constitutional knowledge by passing a written exam, and the results of said exam must be public record.
In the words of Arkansas Senator Mark Pryor. "You don't have to pass an IQ test to be in the Senate." Well, an IQ test would be great too, but we'll settle for basic Constitutional knowledge.