I don't agree with a line item veto for the President. IMHO, that is unconstitutional, since the Congress controls appropriations.

On a political level, I don't think the POTUS should have that power, as it puts too much power in his hands.

I don't like the way this earmark process works, but I don't a line item veto is the answer. Theoretically, those earmarks are politically vetted, and approved by Congress. One stroke of the pen undoes a whole political process.

In reality, that process is broken, and the only thing that will fix it is new leadership.