Answer:
A poll tax could prevent someone from voting if they are too poor to be able to afford to pay the tax. A literacy test could be used if the person didn't have a formal education that taught them how to read.
The second amendment i will look in my notes for the quote
A. True yes San Diego is a megalopolis
So all the power isnt in one persons hands, and because if checks and balances werent here one person would hold all the power which would be bad :)