Good Reads meta-data is 30 pages, rated 3.61 by 324 litizens.
Genre: Sy Fy.
DNA: A.I.
Verdict: Singular indeed.
Tagline: Take that, Electoral College!
In distant 2008 political campaigns remain, but…the electorate is different. The omnipotent computer HAL in each presidential election identifies THE representative voter and that is the only one who votes on the day. In this story that is one Mr Norman Muller whose mundane work and home life is disrupted by having this responsibility thrust upon him, but, well, he answers the call of this civic duty, or rather the questions about the price of eggs, how often he mows the lawn, what his favourite colour is, how much he spends on gasoline, and a battery of other questions for three hours, and HAL then decides which of the two candidates best fits Muller’s answers to these questions.
Oops, that is a spoiler I guess.
THE elector does not vote for a candidate but answers a host of questions about anything and everything, and then A.I. does the rest.
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If ye search you will find the text online. I did.