While there's eight more days to go before the election, more than 22 million people have already cast their ballot, but an army of millennials aren't among them.

Young Americans make up a far smaller share of the vote than they did in 2012. The percentage of early voters has diminished in Virginia, Iowa, North Carolina, Nevada, Georgia, Colorado, Maine, Ohio, Arizona, Alaska, Wisconsin, and Michigan, according to the New York Times.

Only Virginia has seen the share of millennials make up more than 10 percent of total early voters. In some states, young voters have dipped below even five percent, and Iowa, North Carolina, and Ohio have seen the largest slide.

Millennials aren't the ones who are less than enthusiastic about casting an early vote in 2016; African Americans numbers are also dropping heavily from their 2012 figures.

Black voters have increased turnout slightly in states with relatively small African American populations like Wisconsin, Alaska, and Utah.

States with large black populations, however, have dropped precipitously from 2012 including Georgia, North Carolina, Virginia, Ohio, Michigan, and Nevada.

So while Democrats still maintain an early voter advantage in most swing states, as they do almost every election cycle, trends are showing that their base of young and black supporters are less than enthusiastic about getting out and casting ballots for Hillary Clinton than they were about Barack Obama in 2012.

If it comes down to a close election, this lack of excitement to vote early and vote often may cost Clinton the White House.