When people who know what they're talking about talk about "election hacking," they know that no actual hacking took place. They were Facebook ads. That's it.
If you think Russian "election interference" (does that term make you feel better?) was limited to "Facebook ads" you either haven't been paying attention, or are just trolling. I'm going to guess the latter.
You're kidding, right? There is an unsealed speaking indictment from the Department of Justice [1] that details the GRU hacking operation that released the DNC emails.
We do have evidence that the voter databases of at least 20 states were targeted and a few successfully accessed. At least publicly, it is uncertain as to whether data was changed in any way.