Even though the "elastic clause" gives the congress the power to pass all laws considered "necessary and proper," which of the following legally protects the people from congressional abuses? state legislatures and court systems international organizations like the u. n. the executive and judicial branches the armed forces and militia

The executive and judicial branches Legally protect the people from congressional abuses. 

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.