Bernie Sanders is throwing a house party for America on Wednesday night, and everyone is invited.

In an attempt to capitalize on his grassroots momentum, the Vermont senator and presidential contender is organizing a live stream event of the campaign party in southwest Washington, D.C.

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The event will be broadcast on BernieSanders.com at 7 p.m. ET and also played at planned mini-rallies in thousands of homes and other locations. The parties are meant to mobilize his supporters and form local campaign groups.

"He will thank supporters and talk about ways they can help build a political revolution" at the event, according to his campaign.

Ahead of the event, more than 3,000 gatherings were organized across all 50 states, according to a statement from the Sanders campaign. More than 100,000 people have RSVP'd to the campaign indicating they will participate in the event.

In June of 2008 in his first bid for the White House, President Obama used a similar tactic, hosting 4,000 online house parties. But no candidate has yet to stage a widespread event of this scale—if the turnout is as expected— in the 2016 race.

"What people understand is yes, these other guys and their super PACs may have unlimited sums of money, but at the end of the day when people stand together... there is nothing we can't accomplish," said Sanders, in a video appeal posted to his Twitter account a day before the event.

I look forward to seeing you tomorrow night. To join us, please visit http://t.co/eoxQ1c1zUT. https://t.co/0LxjqinYrY — Bernie Sanders (@BernieSanders) July 29, 2015

Aidan King plans to attend one of these parties in his hometown of Montpellier, Vermont.

King, a longtime Sanders supporter, is one of the cofounders of the popular /r/SandersForPresident subreddit. It currently has nearly 70,000 subscribers and has become a rallying point for digitally savvy Sanders supporters to organize. Thousands have shared plans on Reddit for Wednesday's meetings.

But King is looking forward to the chance to get together with other Sanders supporters in person.

"They’re not scripted....they are free flowing and everyone gets a chance to speak," said King. "I'm mostly going to listen and to learn."

The campaign has an impressive map of supporters' meetings on their website ahead of the event, with red dots denoting where the gatherings are being held.

The map was created by Ralph Castillo, another Sanders supporter and member of the Sanders subreddit who first posted the map there. The campaign later reached out to Castillo to see if they could feature his map on the BernieSanders.com official campaign site.

The day Democratic frontrunner Hillary Clinton broadcast her kick off rally in June, but the event was not solely dedicated to organizing supporters.

Despite the healthy turnout at Sanders' recent events, he is still trailing well behind Clinton in the polls, with about 19% of Democratic support compared to Clinton's nearly 57%.