It is main tool the president has to restrain Congress. Congress will pass laws if they believe the president will veto them when it comes to his desk, therefore he can partly enforce his political agenda within many pieces of legislation as congress are susceptible to threat of it.
This ensures it is an effective negotiating tool too.
The veto allows the President (head of the Executive branch) to refuse to sign into law legislation enacted by the Legislative Branch. This is an exercise of the balance of powers provided by the Constitution of the United States. Once legislation has been vetoed it forces the Legislative branch to revisit the legislation. If the Legislative branch can gather the necessary 2/3 majority, it can override the Presidential veto.
The bottom line is that by killing legislation the Presidential veto puts the Legislative branch (and the US populace) on notice that s/he is in opposes the proposed legislation as written.
It is powerful because he has the ability to force the congress to rethink their former ruling, but they can override the veto but it requires more votes, I think.
Because it requires a two thirds vote (a "supermajority") in Congress to overturn a President's veto, and this is usually quite difficult to accomplish.
Answer:
It allows the President to stop a law from taking effect.
Reason:
The veto power gives the President the right to reject a bill. This is one of the final steps in the lawmaking process. In order for the vetoed bill to become a law, Congress must vote to override the veto by a two-thirds majority.
congress can override
2/3 to override a presidential veto
Each chamber must have a 2/3rds vote in order to override a presidential veto. Congress rarely overrides a presidential veto.
67 senators and 291 members of the house have to vote to override the presidential veto
congress has overruled a presidential veto about 200 times
Congress can override a presidential veto
A presidential veto.
no
Veto
To override a President's veto Congress needs to have 2/3 or more of the vote.
Legislative
checks and balances