Anyway where would you deport them to?
Michigan.
"Why are there three branches of government"? LOL. You could write a 100-page report on how our current view of three branches of government developed, and still not actually answer the question.
And "what does the constitution do" is so vague as to be ridiculous, unless they're talking of the original document, in which case the answer is sitting on a shelf in the LoC.
"Name one idea" though is easily answerable... not to mention, easily crammable for.