The American Judicial System, part of the Senate decides which laws are constitutional.
Legislative.
Judicial
Legislative
The supreme court
judicial
Legislative
To my knowledge it must be the Judicial Branch because the judicial branch carries the Supreme Court and their ones who decides if a law is constitutional.
The judicial branch is the main actor that decides whether or not an action of the government is unconstitutional. However, technically the President can decide not to enforce parts of a law Congress passes on the basis of unconstitutionality through constitutional signing statements.
the Judical branch A.K.A. the supreme court
The Judicial Branch decides whether or not a law is unconstitutional.
The Judicial Branch of the government, which is divided as various courts on the state level and as the Supreme Court on the Federal level, decides whether laws are Constitutional or not.
no