No branch, but the constitution itself does this.
The Congress
Congress.
Congress -PrinceBlast
Executive Branch
The constitution
The judicial branch determines if a law is constitutional or not.
The Legislative Branch.
The legislative branch is responsible for the approval and ratification of treaties.
The legislative branch is responsible for the approval and ratification of treaties.
Ratification by the three-fourths of the state legislatures
Ratification by the three-fourths of the state legislatures
Ratification by the three-fourths of the state legislatures