2. Criminal groups want to choose sheriff, prosecutor or judge, to avoid prison.
3. Thieves want to benefit from millions of dollars in contracts, land use decisions or other regulations. Governments in the US spend $7 trillion per year, and are chosen by 100 million ballots per year. So the average ballot controls $70,000 of spending, half federal, half state and local.
4. Foreigners who want to support one side, or destabilize government by defeating incumbents. Republicans think domestic hackers are more likely. Democrats think foreigners are a bigger threat. Voters in whichever party wins have little support for retaliation.