Jeremiah Poff writes for the Washington Examiner about a critical constituency for Democrats’ electoral prospects.

To the Democratic Party and the future political prospects of Vice President Kamala Harris, there is no constituency more important than single women.

When it comes to relationship status, no factor is more of a predictor that a woman will vote for the Democratic Party than that she is single. On the flip side, no factor is more of a predictor for a woman voting for the Republican Party than that she is married.

According to data from the Pew Research Center, 50% of married women are registered Republicans, while 45% are registered Democrats. But 72% of never-married women are registered Democrats, while a meager 24% are registered Republicans.

By contrast, the partisan split among men is much less pronounced, with 59% of married men as registered Republicans, as well as 37% of never-married men. As Election Day rushes closer, there is more and more evidence that even young single men are turning toward former President Donald Trump and the Republican Party at an ever-accelerating rate.

These glaring differences in voting behavior based on marital status, as well as a growing education divide in the electorate, have laid the groundwork for the most pronounced gender gap among voters in the history of presidential elections. By any reasonable assessment, a decisive majority of male voters will support the return of Trump to the White House, while a decisive majority of female voters will support Harris and the Democratic ticket.

The reasons for this political divide between the sexes can be boiled down to one primary factor: the steep decline of marriage among the populace, which has coincided with a precipitous drop in the nation’s fertility rate. To understand why this decline happened, we have to review how cultures and peoples across time and around the world have treated and practiced the institution of marriage.