Americans hacking these machines strikes me as a far more probable and worrisome outcome. As a voting citizen, I don’t care for the leap of faith required for me to believe it accurately tallies my votes vs a physical ballot that clearly represents my democratic will before I drop it in the ballot box. I don’t trust the corporations that manufacture these and I don’t trust the executives who run the corporations.
Also, as an IT professional, I’m mortified at the possibilities for abuse and failure in any digital voting booth. As a taxpayer, I’m upset by the cost of a rapidly obsolete computer that will be dragged out, at best, once every two years.