It has everything to do with your proposal as it is an agreement between the states that does not have Congressional approval.  It's very wording says it will not work if there is not an agreement between the states.   I got the wrong paragraph, it is paragraph 3:   
https://usconstitution.net/xconst_A1Sec10.html
NO STATE SHALL, WITHOUT THE CONSENT OF CONGRESS, lay any duty of Tonnage, keep Troops, or Ships of War in time of Peace, ENTER INTO ANY AGREEMENT OR COMPACT WITH ANOTHER STATE, or with a foreign Power, or engage in War, unless actually invaded, or in such imminent Danger as will not admit of delay.
The caps are mine to make it easy to see where you are trying to violate the Constitution.
Again, this is nothing about an attempt to skirt the fact that the Constitution does not allow for direct elections for president and you are looking for loopholes to exploit.   If you want direct elections for the president and vice president, amend the Constitution.