The federal line item veto raises which constitutional
principles- The Presentment Clause and Delegation of Power.
The Presentment Clause is commonly viewed as a provision that
protects the President's veto power, an association reinforced by
the clause's name.
The so-called “Presentment Clause” of Article I, Section 7 says
that before a bill passed by both houses of Congress can become
law, it must be “presented to the President of the United States.”
The President can then either sign the bill or veto it.