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Legislative Veto Override

A legislative process where the legislature votes to overturn an executive veto, typically requiring a supermajority to succeed.

Updated April 23, 2026


How It Works in Practice

When a legislature passes a bill, it often requires the executive's approval, such as a president or governor, to become law. However, executives have the power to veto legislation they disagree with. A legislative veto override is the process by which the legislature can overturn this veto and enact the bill despite the executive's objections. Typically, overriding a veto requires a supermajority—often two-thirds or three-fifths of the legislative body—to ensure broad consensus.

This mechanism serves as a critical check on executive power, ensuring that the legislature retains ultimate authority over lawmaking. The process usually involves a new vote on the bill after the veto, and if the required majority is reached, the bill becomes law without the executive's consent.

Why It Matters

The legislative veto override is fundamental to the balance of power in democratic governments. It prevents the executive branch from having unchecked authority to block legislation, preserving the legislature's role as the people's representative body. By requiring a supermajority, the override process also encourages negotiation and compromise, reducing the chances of rash or partisan decision-making.

In political science and diplomacy, understanding the veto override helps explain how power is shared and contested among branches of government. It also sheds light on the dynamics of policy-making, negotiation, and institutional design.

Legislative Veto Override vs. Regular Veto

A regular veto is the executive's rejection of a legislative bill, effectively preventing it from becoming law. The legislative veto override is the legislature's response to that veto, a procedural step to counteract the executive's rejection.

While the veto is a single action by the executive, the override is a collective action by the legislature requiring a higher threshold of votes. This difference ensures that overriding a veto is not done lightly and reflects a strong consensus.

Real-World Examples

In the United States, after Congress passes a bill, the President can veto it. Congress can then override this veto with a two-thirds majority vote in both the House of Representatives and the Senate. A notable example is the Civil Rights Act of 1964, where President Johnson threatened a veto but ultimately signed the bill; however, the override process remains a vital part of the U.S. legislative system.

Similarly, many state governments in the U.S. have veto override provisions, often requiring a two-thirds vote in their legislatures.

Common Misconceptions

One common misconception is that a veto override is easy or frequently successful. In reality, achieving the supermajority needed is often challenging, making veto overrides relatively rare. Another misunderstanding is that the executive has absolute veto power; the override process ensures that this is not the case.

Some also confuse the legislative veto override with other legislative tools like pocket vetoes or line-item vetoes, which have different rules and implications.

Understanding the legislative veto override clarifies how democracies maintain checks and balances, ensuring that no single branch dominates the lawmaking process.

Example

In the United States, Congress successfully overrode President George H.W. Bush's veto of the Water Resources Development Act in 1996 with a two-thirds majority in both chambers.

Frequently Asked Questions