
Todd P. answered 06/25/20
Government Guru with 25+ Years Field Experience
Amanda,
Leah K. provided a very good description of the separation of power among the branches. I have been taught to think of the separation more as a system of shared powers. Each has some small degree of a power you would think falls more in one of the other branches.
The President can issue an Executive Order (E.O.) which has the force of a law. It's not a law. Only Congress makes laws and only Congress (for the most part) can change a law. An E.O. can be negated by a President or ruled unconstitutional by the Supreme Court.
The President may veto a law, which is a legislative power he has.
The Congress may impeach and remove the President, which is an executive power of a sort.
The Supreme Court can rule a law or E.O. unconstitutional thus nullifying it. This is in effect is a legislative power to unmake a law.
There are other examples, but the key is that in order to check or balance each other, each branch of government was given a limited power(s) from the other branches. Pretty neat if you ask me.