I had a random thought, and I wonder if it's already a thing, and what would be the consequences of it.

Imagine a voting system, where a voter, instead of having just a single vote for a candidate they support, has in addition to that a single negative vote against a candidate they are most strongly against.
It of course wouldn't work in a two-candidate, but I imagine that in one with more candidates, in particular something like a proportional-multi-winner, or a first round before a run-off with a single winner (although here I feel like it's more prone to manipulation), it could help curb more "controversial" dominant candidates and push forward more for the "compromise" candidates.
Does this already have a name? Is it used anywhere? What other consequences would there be, like in terms of vote tactics? Is this idea just retarded?

>>1533757 (OP)
>I had a random thought
not a request

>>1533761
The request is "please tell me if this exists; name it if so; list other possible consequences and tell me if it's a bad idea". Did it have to be worded this way?

>>1533757 (OP)
Its Called, "Combined approval voting", idk it its tried or not.

In my opinion I think the point of voting, is picking what the majority wants, so no need for negative feed back because it will probably yield the same results as normal voting, but what we could do is
Score all candidates (e.g., 0–5) then get the top ranked, or Vote for as many candidates as we like.

>>1533768
Thanks. It seems like what I've had in mind is a bit limited version of the combined approval voting, as in you get only a single "for" and a single "against" vote, instead of judging all the candidates, and I think that's what might lead to a difference. Assuming a proportional-multi-winner, you can focus your own "for" vote on your favourite candidate, even minor ones, because why not (assuming the election threshold isn't an issue), but when it comes to "against", the more dominant or controversial candidates are likely to gather disproportionally more of them. "Safe" choices, while they may not be picked as the favourite option often, wouldn't accrue as many negative votes either, and end up with a more positive total than something with more die-hard supporters but also more die-hard opponents.