Should we expect as much from our politicians as we do of immigrants waiting to become a citizen or our high school kids (details inside)?

SC State Senator Josh Kimbrell is working on a bill that politicians should be required to pass a simple test on the Constitution before being allowed to run for office. Any immigrant applying for citizenship must show a basic knowledge of our Constitution. And, apparently in SC, they require high school students to do the same in order to graduate. He points out that politicians pledge an oath to uphold the Constitution although they have never even read it. What are your thoughts on this requirement & should it become nationwide requirement?