The Defacto Model
I propose that this is the model people use when we do not want to reflect or engage much with the election process. Campaigning and debates sort of happen around us for a while and then, on voting day, we vote for the candidate we happen like most. In this model there isn't a lot of conversation to be had because like is pretty subjective, and because we tend to feel attacked when someone criticizes what we like. People who use this model could hardly be described as critical voters; they might or might not be informed but they are not really engaged in critical and careful decision making in a meaningful way. Ultimately, propaganda and in-group identification will probably have the greatest impact on how they vote.The Nuanced Defacto Model
This represents something of an improvement and sometimes an increased degree of cynicism over the defacto model. Voters who use this model are able to recognize that no candidate is perfect (a claim you will likely hear them make incessantly) and are often willing to vote for candidates in the "meh" range so long as that candidate's opponent is in their "no" range. These voters vote against a candidate at least as often as they vote for one. When they vote they often do so out of a sense of civic duty or out of group identification (the candidate may be "meh" but either they support the party or all of their friends vote) but they can occasionally become energized voters when the encounter a candidate in their "yes" range.
The Moral Integrity Model
This step brings us closer the model which I am proposing (though I still want to add some more complexity). Here the question you would ask about a candidate is not "do I like them" but "am I morally comfortable with this candidate?" In this model a person's response to that question can range from "no" through "I can vote for the candidate but I have reservations about them" up through an enthusiastic "yes". I have built a range into each of these three categories to allow for the uniqueness of persons. I can heartily affirm two different candidates and still find one to be better than the other.
The really important addition to this model is what I have labeled the line of integrity which divides the reservations range from the no range. That line is critical to the way I think about candidates and its placement is always at the top of the no range. In this model, to ask someone to vote for a candidate who exists below the line of integrity is to ask that person to violate their actual conscience (note that a person's actual conscience may be different from their stated or public conscience and that sometimes they might not be aware of the difference). A lot of the cross-talk argument in the center and on the left had to do with misunderstanding the line of integrity and/or misdiagnosing its location. For now I will restrict myself to saying that everyone who is not a psychopath or sociopath has a line of integrity somewhere insofar as they would not vote for a candidate who advocates unabashed genocide no matter how much they agree with that candidate on other dimensions or how much they dislike with the candidate's major opponent.
Voters who use some version of this model are more likely to develop some degree of resistance to the most common form of propaganda and will sometimes break from their peer-groups when voting. Because there are candidates whom these voters consciously cannot support, they are somewhat more likely to have voted for 3rd party candidates, or to have been conscientious non-voters in some elections (it will depend on who is on the ballot). Most notably these are the voters who are most likely to vote against their typical party or ideological affiliations in situations where a candidate is the subject of scandal just because scandals are the sort of thing that can plunge a candidate below the voter's line of integrity. Of course that line will be in different places for different people; its placement is subjective to each individual voter since individual voters will have differing levels of tolerance for (for instance) graft, bribery, theft, or sex scandals. A politician who has cheated on their spouse will likely thereby fall below some voters' line of line of integrity but certainly not all. Further an individual voter's line of integrity will vary both in terms of sensitivity, but also by the dimension involved—remember that we are not talking about the candidate's morality, we are talking about the moral comfort of the voter with the various aspects or dimensions of a given candidate.
With this model we can identify the snarls which lead to some tangled political arguments. If a candidate falls just below Wanda's line of integrity but just above Bob's line, then Wanda and Bob will agree that the candidate is "problematic" and will likely agree about the candidates failings but if they do not recognize the existence and roll of the line (or the fact that they have analyzed the candidate differently in relationship to the line) they will not see eye to eye on whether or not it is possible to still vote for the candidate.
And now that I have mentioned that there are multiple dimensions to any given candidate, let's move on the the "final form' of this model.
The Dimensions of Moral Integrity Model
Just to keep things simple I have only included four dimensions in this illustration but there are actually as many as the individual voter happens to notice or care about. Notably absent from this illustration yet relevant to recent US elections for instance would be Immigration and The Environment but there really isn't any functional limit on the number of dimensions available. The final—and vital—addition to the model here is the recognition that a candidate may well be excellent in one dimension but fall below the line of integrity in another dimension. This complicates both our analysis of candidates, and a voter's capacity to reason clearly about a given candidate. Specifically, I think this this helps to untangle a lot of messy political arguments. When two people argue about whether a candidate is imperfect-but-still-viable or "too problematic" (the most common term I have encountered on the left to imply that the candidate has dropped below the line of integrity) the snarl in their communication may reside in the fact that they locate the candidate on different sides of the line, or that they are judging the candidate on different dimensions. This is further complicated by the fact that each dimension is weighted differently for each person. My "NO" threshold on economics (and economic justice) may be lower than yours while your "NO" threshold is lower than mine on foreign policy.
Let me emphasize that the line of integrity is likely significantly lower than we are generally happy to admit. That is to say that we are generally willing to tolerate more that we would like to say and that this becomes most clear when a candidate who we really like turns out to be significantly "problematic" in one realm. The Democratic ambivalence around Gillibrand's calls for Al Franken to resign would be an example of this. For some voters Franken's behavior fell below their real line of integrity in the issue of sexual assault and harassment; for others it fell above their real line but below their public line. This, of course, resulted in their feeling very ambivalent about the call for him to resign. They do not want to be seen as people for whom his behavior is above the line, but they are also not really convinced that his behavior merited his resignation.
Of course the big problem with all of this is that the moral impetus we feel regarding issues below the line is entirely different from the impetus we feel about those above the line. Below-the-line-of-integrity discussions are different in kind from above-the-line-of-integrity discussions.
That is not to say that it is impossible to have meaningful conversations about political candidates with someone who differs with you about where those candidates stand in relation to the line. It only means that you need to have a different kind of conversation in those situations. At that point, to be meaningful, the conversation needs to be about the facts—"does the candidate really think/say/do that?"—or about the placement of the line itself—"should/shouldn't X really be disqualifying?".
Maybe some examples will help to clarify all of this.
Some Examples
Please note that for all of these examples I will be assuming that the locations on the chart represent your assessment of a hypothetical candidate.
SAMPLE A The Acceptable Candidate
I take this to be the chart for a fairly standard "no candidate is perfect" type of candidate. The candidate here is great on civil rights and you really respect their character. Their economics aren't perfect (you have some significant disagreements with them) and they are frankly far more hawkish/dovish than you are. You likely would not have supported this candidate in the primaries but you will probably be a strong supporter in the general election. As a side note, this is also what nostalgic moderate Democrat baby boomers like to imagine "the opposition candidate" charted in "the good old days when we were less divided".SAMPLE B The Baffling No-Go
This candidate is precisely the sort of candidate that is likely to get you into fights with your own friends on social media. Here is a candidate whose foreign policy views you simply cannot countenance. Likely your whole social circle will not be thrilled with the candidate but, if they (and you) agree that the major opposition candidate is even worse then unless they understand your line of integrity, they won't understand why you just can't vote for this "lesser of two evils". This problem will be particularly compounded if you are able to honestly recognize that the candidate is a person of good character who honestly holds to the foreign policy beliefs which you find so unconscionable. This, chart, I suspect represents the way McCain supporters felt about Obama (or at least, it represents the way McCain himself spoke about Obama).
SAMPLE C(1) The Dictator Comparisons
This sample should be fairly straightforward but it has one feature which I think is relevant to our political moment. This is my best mock-up of the way I think most moderate Democrats would have charted Trump. In itself I doubt that there is much surprise here but with a few tweaks I think it can shed some light on one particular frustration.
SAMPLE C(2) The Reluctant Trump Voter
Finally I want to end with a quick look at two hypothetical left leaning Americans in 2016, one of which would have almost certainly voted for Clinton, the other of which would not.
The Reluctant Clinton Voter®
This person is clearly a Bernie supporter, who would have voted for him in the primaries and was likely rather upset when he lost. They may even have blamed Clinton for bankrolling the DNC and ensuring that Sanders never really got a fair shake. Nevertheless, they would have seen Clinton as a tragically necessary compromise of their ideals and would have voted for her "as a way to stop Trump" and possibly consoled themselves with the virtue of supporting the first woman candidate in a major political party (though they were probably wishing she had been Warren).The #NeverClinton #NeverTrump Voter
Notice that this is another Sanders supporter. The difference with the Reluctant Clinton Voter® is only that for this person, Clinton fell below the line of integrity when it came to foreign policy (maybe all the Benghazi talk worked on them, maybe they are a strong dove and see her as part of "the Blob"). This is a likely Johnson or Stein voter or a principled non-voter. This is also the person whom the Reluctant Clinton Voter likely railed at in the aftermath of the 2016 election. Unless they clarified their differences viz. the line of integrity on foreign policy, both of these voters probably left the conversation without making any headway and incredibly frustrated with one another. This voter likely saw the Reluctant Clinton Voter as lacking in integrity (after all, they admitted that her foreign policy positions are problematic) and the Reluctant Clinton Voter likely saw this person as too precious and concerned to care about the real harm that Trump is going to do to oppressed minority people and the the country's norms and institutions. This, despite the fact that the two of them agree perfectly on everything about Trump. If we were to lower their real lines of integrity and add public lines of integrity, the confusion might become even more clear.
Conclusion
I hope that you find this to be useful tool in modeling the way people make minimum-viable political and electoral decisions. Please don't hesitate to hit me up in comments if you have suggestions, critiques, or questions about how I could improve or modify this.
*I have explicitly chosen to ignore the roll that party and ideological association and attendant in-group/out-group effects have on our estimation of a candidate by simply presenting the estimations as final and not exploring the reasons we have for locating a given candidate at a given spot on the chart. Those reasons are real and the proper subject of healthy and passionate political, sociological, and religious debates. For the purposes of this analytic model, however, they may be simply taken as givens.