In addition to Congress, the President can declare a law by executive order. Also any executive branch agency (EPA, HHS, etc.) can issue executive mandates. However, the Presidential executive order power is limited only to further the enforcement of already existing laws.
In the American system of government, no-one has the power to "declare" laws, since we do not have a king or autocratic ruler. Congress is the branch of the government that makes the laws. After a law has been passed, it is sent to the president, who can either sign it into law or veto it.
At the Federal level, the House and Senate. At State level, the state legislature. At City and County level, the City Council or County Board of Supervisors.
They can declare war and make federal laws
The power of judicial review allows the US Supreme Court to declare laws, policies, executive orders and US treaties that are relevant to cases before the Court unconstitutional and nullify them if they violate the principles of the US Constitution.
The US Supreme Court's ability to declare an Act of Congress unconstitutional arises from the implied power of judicial review.
Executive
The system if checks and balances deals with the separation of powers between the 3 branches of government. The congress makes the laws and can override a presidential veto with a two thirds vote. The executive branch has veto power over the laws passed by the congress. The judicial branch interprets the laws and has the power to declare a law unconstitutional.
In the US federal government, the President has Veto power.
congress
Judicial-applying their interpretations of the constitution and laws to controversies.Legislative-can declare wars, make laws, have the power to borrow money when necessary, and collect taxesExecutive- carrying out the laws that the legislative branch created
the Government makes the laws for us
To rule effectively, a government must have power and the ability to exercise that power over people. In the US, the ability to make laws and regulations provide the government with power.
Judicial :)
inherent powers