I could never support a democrat who supports loan sharks over poor, desperate people

[still_one]

52. If the question was phrased, "do you support the pay loan industry?", I would venture that 99% of

of the folks on DU would readily say they do NOT support the pay loan industry, which as you mentioned amounts to legalized loan sharking.

However, the problem with a one issue voter is that other issues get put on a back burner, and that can be very problematic when the whole picture is viewed.

Voters should look at all the issues, and determine which candidate more closely represents their views with regard to ALL the issues, and make their choice accordingly.

If both candidates support an issue that the voter disagrees with, then the question arises, should the voter not vote for either candidate, with the almost certain result that one of the two leading candidates will win, or instead examine where the candidates stand on all the issues, and vote for the candidate that more closely represents their views.

there are other criteria also, such as would the loss of one candidate over another cause the loss of the majority in a legislative body, and would that outcome create more damage?

This is why single issue voters run a risk of actually voting against their own interest. The republicans love to use wedge issues to influence single issue voters. Guns, Gays, and God, are issues republicans have used in the past to try and influence single issue voters.