Contents I. Introduction ......................................................................................................................................... 1 II. Annulments as a Remedy for Electoral Irregularities........................................................................... 2 Legal Approaches to Annulment .............................................................................................................. 2 When Irregularities Are Outcome-Determinative ............................................................................... 6 When Tainted Votes Are Determinable ............................................................................................... 8 When Tainted Votes Are Undeterminable ........................................................................................... 9 III. Grounds for Annulment ..................................................................................................................... 10 Voter Registration Irregularities ............................................................................................................. 12 Polling and Counting Irregularities ......................................................................................................... 12 Problems with the Transmission, Tabulation, and Certification of Results ........................................... 13 Campaign Finance Violations.................................................................................................................. 14 Developing Threats, Such as Cyberattacks and Disinformation ............................................................. 14 Referendum Irregularities ...................................................................................................................... 15 IV. Procedural Considerations ................................................................................................................. 16 Presumption of Validity and Burden of Proof ........................................................................................ 16 Standard of Evidence .............................................................................................................................. 19 Timeline .................................................................................................................................................. 22 V. Conclusion .......................................................................................................................................... 24

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