The line-item veto is legislative authority exercised by the executive; that's not something that's supposed to happen. The President already legislates through the executive order (which is why the power and scope of the EO should be drastically reduced), no more legislation through the President. The President isn't king, he shouldn't be able to write and enact law. If we're looking for restrictions, we should look to the Congress side because a lot of the arguments for this are born out of the ridiculous nature of some of the bills which come out of Congress. We should also enforce through votes some form of reasonable parliamentary procedure. If politicians are not willing to be rational and logical, they should lose their seat. It's a lot to ask for, but I don't think giving the President legislative powers is the solution to the problem.