Congress can override a presidential veto only by repassing the bill with a two‑thirds vote in both the House of Representatives and the Senate; if they reach that threshold in each chamber, the bill becomes law despite the president’s objection.

How Can Congress Override a Presidential Veto? (Quick Scoop)

The basic rule

When the president vetoes a bill, Congress gets one last shot at it:

  • The vetoed bill is sent back to the chamber where it started (House or Senate), along with a written “veto message” explaining the president’s objections.
  • That chamber can choose to “reconsider” the bill and hold an override vote.
  • To succeed, two‑thirds of the members present and voting in that chamber must vote “yes.” A simple majority is not enough.
  • If it passes there, the bill goes to the other chamber, which must also approve it by a two‑thirds vote.
  • If both chambers clear the two‑thirds bar, the veto is overridden and the bill immediately becomes law , just as if the president had signed it.

If either chamber falls short of two‑thirds, the veto stands and the bill dies (unless Congress later starts over with a new bill).

Step‑by‑step process

Think of it like replaying the end of a game, but with a higher score needed to win:

  1. President vetoes the bill
    • The president returns it to the originating chamber with written objections.
  1. Originating chamber reconsiders
    • Members debate the president’s reasons and decide whether to attempt an override.
    • A quorum (simple majority of members) must be present for the vote.
  1. First override vote
    • The chamber holds a recorded roll‑call vote—no voice votes allowed for an override.
 * If at least two‑thirds of those present and voting say yes, the bill and veto message move to the other chamber.
  1. Second chamber’s vote
    • The second chamber debates the veto and then holds its own two‑thirds recorded vote.
 * Again, failure to reach two‑thirds means the veto is sustained and the bill fails.
  1. If both reach two‑thirds
    • The presiding officers certify the override, and the bill becomes law without the president’s signature.

Important exception: the pocket veto

Not every veto can be overridden:

  • If the president simply does not sign a bill within 10 days while Congress is still in session, it becomes law automatically without a signature.
  • But if Congress adjourns during that 10‑day period , the president can use a “pocket veto” by not signing and not returning the bill.
  • Because the bill is never formally returned, there is no chance for an override vote ; Congress would have to re‑introduce the bill in a later session.

Why overrides are rare (political reality)

On paper, it’s just math: hit two‑thirds in both chambers. In practice, that’s a heavy lift:

  • Two‑thirds in each chamber almost always requires cross‑party (bipartisan) support , unless one party holds a very large supermajority.
  • Presidents can use the public veto message and media attention to pressure lawmakers to stick with the veto.
  • Overrides usually happen only when there is broad national consensus or intense pressure that crosses party lines (for example, on major sanctions bills or high‑profile security legislation).

So while the Constitution clearly allows Congress to override a presidential veto, it deliberately makes it hard , reinforcing the checks and balances between the branches.

Mini forum‑style takeaway

“So, how can Congress override a presidential veto?” By replaying the vote at a higher difficulty setting: both the House and Senate must re‑pass the same bill with at least two‑thirds of members present and voting in each chamber; do that, and the bill becomes law over the president’s objections, unless it was a pocket veto, which can’t be overridden.

TL;DR: Congress can override a presidential veto only if both the House and the Senate vote to pass the bill again by a two‑thirds majority of members present and voting ; pocket vetoes are the big exception and cannot be overridden.

Information gathered from public forums or data available on the internet and portrayed here.