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In the wake of Donald Trump officially taking office, millions have protested and marched on the streets of cities around the country. But one question on many people's minds has been: how can those opposed to the new presidency continue to make real change?

One answer comes in the form of Swing Left, a rapidly growing grassroots effort organized by a loose, eclectic mix of professionals in media, tech, art and nonprofits that aims to help Democrats win the House of Representatives in 2018. 。

SEE ALSO:At Debug Politics, engineers try to fix everything that went wrong with the 2016 election。

The organization has mapped out the 52 so-called swing congressional districts around the country on its site, where Americans can organize and volunteer to help Democrats win districts that hold the closest of political contests. In these places, the incumbent last won by less than 15 percent of the vote -- making them the most crucial of political battlegrounds, as  。 Business Insider。Business Insider 
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reports.。

The group has grown rapidly in just the short time since Trump officially took office. The day after Trump's inauguration, on Saturday, it tweeted that it had grown by at least 20,000 people.。

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On Sunday, that number had quickly swelled to 100,000 people.。

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Organized by a loose, eclectic mix of professionals in media, tech, art and nonprofits, Swing Left's ultimate goal is to get those 52 swing districts won by Democratic candidates. Doing this in the 2018 elections would shift the current political landscape.。On the group's website, users can fill in their zip code and find the swing district nearest to them. 。Mashable Top StoriesStay connected with the hottest stories of the day and the latest entertainment news.Sign up for Mashable's Top Stories newsletter
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By signing up you agree to our Terms of Use and Privacy Policy.。

By signing up you agree to our Terms of Use and Privacy Policy. 。 Thanks for signing up!。Credit: https://swingleft.org/
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When  。

Mashable 。

plugged in a Los Angeles zip code, the result was California's 25th congressional district -- a swatch of land encompassing northern Los Angeles and part of Ventura County that's currently under Republican control.。

The district's current Republican representative, Stephen Knight, won by just 16,349 votes -- or 6.3 percent of the vote -- in the last election.
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Signing up with the website gets you weekly emails about fundraising, donating, and volunteer work such as working phone banks and spreading the word on social media for that particular district. 。

Swing Left's website also has a map that shows exactly where each of the 52 swing districts are located. 。

The group's strategy has already won the praise of many Americans on social media. 。

The group's strategy has already won the praise of many Americans on social media.。

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Tweet may have been deleted 。 Tweet may have been deleted 。But not everyone's a fan of the site. Some have pointed to glitches in the system, such as weird results after plugging in their zip codes.。 Tweet may have been deleted。Meanwhile, others said Swing Left's lack of affiliation with any traditional Democratic groups and its lack of transparency about who exactly is running the show makes it a little sketchy, as 。

Daily Kos 。

Daily Kos。

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reports. Thus, such opponents say, it might not a place where you should be entering personal information like your zip code.  。

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has reached out to the site for more information.。

Tweet may have been deleted。Despite such concerns, finding the congressional districts that are most politically flexible is probably not such a bad idea if the current political landscape is ever expected to shift.。Featured Video For You。Featured Video For You 。Across the globe, nasty women and men hit the streets one day after Trump's inauguration。TopicsDonald Trump。