“people often misstate or misremember their vote from previous elections.”
[citation needed]
The idea that people tend to remember voting for the winner comes from the results of the polls themselves. When polled, a higher percentage of people claimed to have voted for the winner of the previous election than what the actual results were. The author seems to interpret that to mean people either don’t remember or they are lying. It never occurred to him that people who voted for the loser in the previous election are less likely to participate in a poll.