The_have the power to decide whether or not an action of the government violates the constitution?

The supreme court

Explanation:

The system of checks and balances were set up to work that way

i am not 100% positive but i think it is is b. both are non-partisan jobs

i am pretty sure that members of congress have term limits, can be impeached, and are nominated through direct popular vote.

to force terrorists groups to stop attacking western targets using massive military force.