Identify the devices and legal mechanisms that were employed to prevent african americans from voting.

the devices used to prevent African Americans from voting was voter qualifying tests (e.g., literacy tests), discriminatory enforcement of registration rules, poll taxes, there was also the grandfather clause that stated if you have a ancestor that voted before you it entitles you to voting without taking any test. 

its whatever your mind tells you

federal power is further limited with a system of checks and balances that gives each branch of government a measure of power over the others.

explanation: