Although this is a national election the mechanisms for conducting it are entirely under the control of the states. Republican run states would ignore such an order. Democratically run states would ignore it because it would disenfranchise their voters and the downstream impact of that might damage them much more than losing a presidential election.
The Framers were really smart in the way they designed the government. However, they never in their wildest nightmares envisioned a president who was anti-American. They probably thought the voters were too smart to ever elect such a man. The basic design of the system they created, however, is sound and will function as intended.
Sure they did, that is why we have the natural born citizen requirement to be eligible to be President. A requirement this man does not meet though.
Not true:
"Experience hath shewn, that even under the best forms of government those entrusted with power have, in time, and by slow operations, perverted it into tyranny." -- Thomas Jefferson
“Although this is a national election the mechanisms for conducting it are entirely under the control of the states.”
Oh? Then explain how Federal judges just overturned the voter ID laws of four separate States.
The truth is, we no longer have sovereign states, but serfdoms, which are subservient to a feudal oligarchy.