BROOKLYN - Tuesday marked National Voter Registration Day and the time to make the Oct. 14 deadline is running out.

In Brooklyn, the New York Public Interest Research Group set up outside the Barclays Center subway stop for a voter blitz to ensure voters are registered before the deadline.

"People don't feel they're being represented. People aren't represented because they're not voting. There’s no reason for elected officials to listen to their constituents if they're not voting. Everyone needs to go out and have their voice heard and hold their elected officials accountable no matter what they believe,” says Kevin Dugan of NYPIRG.

In 2008, nearly 6 million Americans did not vote because they missed the registration deadline or didn't know how to register. National Voter Registration Day was launched in 2012 to remind and encourage people to register to vote.

Social media platforms like Twitter promoted the day by launching a campaign to remind U.S. citizens to vote. After doing so, Twitter says people let everyone know they registered by using #Iregistered. Facebook and Google are also launching similar initiatives on their sites.

Volunteers, celebrities and organizations from all over the country planned to hit the streets to promote voter registration campaigns.