Oh, sure, there are arguments. But the whole process is an attempt to amend the Constitution without actually amending it.
The SC doesn’t like such ‘amendments’ to be so obvious.
No doubt this is an attempt to circumvent the Constitution and go to direct election of a President rather than thru the Amendment process. The Dems have won the popular vote in 6 out of the last 7 Presidential elections. Obviously, they see NPV as a way to be the permanent majority party.