In the United States, the US Supreme Court ensures that laws passed by Congress and signed into law by the US President, are "Constitutional". The Court can wait until a case concerning a law is brought to the Court, or in some cases the Court acts on its own. To act without a case being brought to its attention & declared as unconstitutional was established in 1800.
The Judicial branch declares acts or actions to be unconstitutional.
By declaring laws “unconstitutional
Yes. The Judicial Branch can declare a law unconstitutional, and it can declare presidential actions unconstitutional.
by declaring an act of congress to be unconstitutional
Declaring it unconstitutional.
The Legislative Branch sometimes passes unconstitutional laws, but they're not supposed to. None of the branches is authorized to create unconstitutional laws.
Judicial
Judicial
Judicial branch
legislative branch is the responsibility of declaring war.
supreme court
supreme court