As usual, I have little idea what the author means by "blockchain". If he means a bitcoin-like blockchain based on proof of work, it is completely overkill, as there is no problem in forking and merging vote logs if everything is authenticated and public enough. But anyway, it completely ignores the elephant in the room. Get an electronic voting system that is both anonymous, verifiable, and free of voting coercion,…
[1] https://www.youtube.com/watch?v=ZDnShu5V99s (long)