In late June, early-July, the Arizona Secretary of State's office closed down the state's voter registration system after someone compromised valid credentials and used them to access the system.
Shortly after that incident, on July 12, someone exploited the Illinois Voter Registration System (IVRS). According to Ken Menzel, the general counsel for the Illinois board of elections, the attackers were able to exploit "a chink in the armor in one small data field in the online registration system."
Voter registration system attacks illustrate something important about voting security: attackers can still do national-scale damage by attacking less fortified local targets, without having to physically go hyper-local.
Individual legislators change the balance of power, both nationwide and statewide. Seemingly small decisions can have major impacts on regional economies and the moves of multinational corporations.
See the recent decision by Waitsburg, Washington's city council to block the construction of a Nestlé bottled water plant in their town. It's not clear what Nestlé will do as a result, but that one small decision
Now, imagine all of the different ways it's possible to mess with that election. What happens if an attacker finds a way to drop half of all voters from the rolls, or manages to delay or block delivery of vote-by-mail ballots?
We’re now in a world where it’s important for national governments to fund local governments' information security efforts, before something catastrophic happens. Welcome to the future.