Question

this federal governments branches must stay within their limits by the ability to \check\ on each other:
checks and balances
consent of the governed
federalism
limited government
popular sovereignty
rule of law
separation of power

Explanation:

The concept described is about the federal government's branches staying within limits by checking each other. "Checks and Balances" is a system where each branch can check the powers of others. "Separation of Power" divides government into branches (legislative, executive, judicial). These two work together: separation divides power, checks and balances ensures no branch oversteps.

Answer:

Checks and Balances & Separation of Power