Single women are a force.

Granted, they’ve always been a force to be reckoned with. But now they’re becoming a powerful voting bloc that could decide this election.

This hasn’t gone unnoticed. Author Rebecca Traister’s book All the Single Ladies: Unmarried Women and the Rise of an Independent Nation focused on this demographic and how its members are shaping and redefining social norms when the book was released earlier this year. One of Traister’s sources, Page Gardner, predicted that “there could be more unmarried women in the electorate this year than married women — and they vote super left.”

This trend gained steam in 2012. Single women comprised 53% of the voting population, and supported President Barack Obama at around 55%. Compare this to men, who supported Obama at around 45%.

And beware, these single ladies are selective with their votes: The results of the American Women Web survey in the Elle March 2016 issue found that 86% of single women, and 84% of overall women, would not vote for a candidate that was anti-women. This wasn’t partisan, since 73% of Republican women agreed with that statement.