I posted the link to the Congressional hearing in 2018 where the Founder of KNOWiNK testified, and ADMITTED they store voting info on AMAZON GOVCLOUD.
AWS GovCloud (US)
Amazon's Regions designed to host sensitive data, regulated workloads, and address the most stringent U.S. government security and compliance requirements.
AWS GovCloud (US) gives government customers and their partners the flexibility to architect secure cloud solutions that comply with the FedRAMP High baseline; the DOJ’s Criminal Justice Information Systems (CJIS) Security Policy; U.S. International Traffic in Arms Regulations (ITAR); Export Administration Regulations (EAR); Department of Defense (DoD) Cloud Computing Security Requirements Guide (SRG) for Impact Levels 2, 4 and 5; FIPS 140-2; IRS-1075; and other compliance regimes.
AWS GovCloud (US-East) and (US-West) Regions are operated by employees who are U.S. citizens on U.S. soil. AWS GovCloud (US) is only accessible to U.S. entities and root account holders who pass a screening process. Customers must confirm that they will only use a U.S. person (green card holder or citizen as defined by the U.S. Department of State) to manage and access root account keys to these regions.
From Controlled Unclassified Information (CUI), Personally Identifiable Information (PII), sensitive patient medical records, and financial data to law enforcement data, export controlled data and other forms of CUI, AWS GovCloud (US) Regions can help customers address compliance at every stage of their cloud journey
Can't post direct link for some reason
Searched Amazon GovtCloud