the process of the president's voting a law passed by congress and congress overriding the veto is an example of which principle

The process you are describing, where the President vetoes a law passed by Congress, and Congress overrides the veto, is an example of the system of checks and balances in the United States government. This principle is designed to prevent any one branch of government from becoming too powerful.

Specifically, it involves the power of the President to veto legislation and the power of Congress to override a veto. Here's how it works:

1. Presidential Veto:

• The President has the authority to veto a bill passed by Congress. This means the President can reject the proposed legislation, preventing it from becoming law.

2. Congressional Override:

• However, the Constitution provides a check on the President's veto power. If Congress disagrees with the veto, it can override the President's veto by obtaining a two-thirds majority vote in both the House of Representatives and the Senate.

This process reflects the idea that each branch of government has the ability to check and balance the actions of the other branches. It ensures that decisions are not made unilaterally and that there is a degree of cooperation and consensus-building among the branches.

The relevant constitutional provision is found in Article I, Section 7, Clause 2, which states that for a veto to be overridden, "it shall be determined by Yeas and Nays, and the Names of the Persons voting for and against the Bill shall be entered on the Journal of each House respectively."

In summary, the process of the President vetoing a law and Congress overriding that veto illustrates the principle of checks and balances in the U.S. government.