Should it be required to pass a test to be allowed to vote in elections?

Dick Cheney was allowed to be VP and he did not serve. In fact he was a 5 time draft dodger. Yet he made the decision to send troops to Iraq and wants Obama to send them back. Most members of Congress on both sides have not served.

Maybe to keep your US citizenship and right to vote we should have to pass the same test non citizens have to pass to become citizens and graduate from high school.