Prediction markets show Hillary Clinton with an 84 percent chance of winning on Nov. 8. But even with the gap between Clinton’s and Donald Trump’s overall support, one major question will remain unanswered after Election Day: When will millennials begin to split along typical Republican-Democratic lines?

A September Quinnipiac University poll found that Clinton led among 18-34 year olds with 31 percent of the group’s support. Surprisingly, Libertarian candidate Gary Johnson finished ahead of Trump (29 percent and 26 percent) and Jill Stein, the Green Party’s nominee, captured 15 percent. This means that millennials’ support for third-party candidates was 13 percentage points higher than their support for Clinton.