Yes. In order to repeal a law, Congress must introduce new legislation which states that a previous law (Health Care Reform, Don't Ask Don't Tell) is repealed. Theoretically, if the Senate did pass a bill which repealed the Health Care Reform Act, then it's up to President Obama to veto the bill. This would place the veto subject to an override by a 2/3 super majority in each chamber of Congress.
Currently, the House does not have to votes to over ride a Presidential veto.
The president can not pass laws or repeal laws. Only Congress can repeal a law and that is by passing a new law that overrides the law to be repealed. Both houses of Congress must pass any law including one that repeals a previous law and the president has the option of vetoing it like any other bill passed by Congress.
Congress could pass a law to nullify an executive order and the Senate can refuse to ratify a treaty proposed by the President.
Congress cannot veto a law. Any law must be written and passed by Congress in the first place. The president can then veto it. Congress can override the veto with a 2/3 majority. After a law is passed, the Supreme Court can strike it down if they declare the law unconstitutional.
If both houses of congress vote by 2/3 to override a presidential veto, it automatically becomes law despite the President's veto.
the congress can veto a law the president passed
The President
The president can not veto an actual law. He can veto a proposed law or bill and prevent it from becoming a law unless Congress passes it again , this second time with two-thirds of the members of both houses of Congress voting in its favor.
Veto
veto
By a veto
The US Congress can pass a law despite a President's veto by vote of a 2/3 majority in each House of the Congress.
Congress can pass a BILL over the President's veto making it a law.
this would be an example of checks and balances.
The president can either choose to sign the bill into law or veto it, but Congress can override a veto.