The Senate rejecting a treaty negotiated by the president is an example of which process in the U S government?

The Senate rejecting a treaty negotiated by the president exemplifies the system of checks and balances within the U.S. government. This process ensures that no single branch, including the executive, can unilaterally make significant decisions without oversight or consent from the legislative branch. The Senate's role in ratifying treaties requires a two-thirds majority, highlighting its power to influence foreign policy and limit presidential authority.