Final answer:
The line-item veto violates the theory of separation of powers by giving too much power to the executive branch and undermining the legislative branch.
Step-by-step explanation:
An argument against the line-item veto is that it violates the theory of separation of powers. The line-item veto gives the executive branch the power to remove specific items from a bill, which can undermine the authority of the legislative branch. This can upset the balance of power and concentration of authority in the hands of one individual. For example, if the President has the authority to remove certain items from a bill, it could potentially lead to an imbalance of power and reduce the checks and balances put in place by the Constitution.
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