You still haven't answered this from NYTimes article in my very first comment, so I have the luxury to wait for your response to this stat:
> “votes cast by mail are less likely to be counted, more likely to be compromised & more likely to be contested than those cast in a voting booth, statistics show.” - Ion Sancho, the elections supervisor
Archive if the NYTimes link shows paywall:
http://archive.is/6ZEMO