We're obviously long past the days when people's politics could be mapped on a nice normal distribution, with some outliers at either end and a big group of moderates in the middle who vote differently depending on the election. Today the distribution is not only bimodal: there's almost no overlap at all.

Your politics are part of your identity now. It's part of how you define who you are, and according to the research, over 95% of people are completely entrenched and will never vote for any candidate from the "other" party. (This the highest since right before the Civil War.)

That said, while nobody's changing sides any time soon, people _do_ stay home on election day, and we're going to see that next election.

The races for the next couple decades will be won by the candidates and the parties who can drill up enough enthusiasm from their base. Preach to the choir so the choir sings, etc.