Which presidential campaign is credited with revolutionizing political product launches by being the first to effectively use social media to announce a candidacy?

Product launches in politics are critical moments that can define a campaign's trajectory. The official announcement of a presidential campaign is essentially a product launch for a candidate's platform and vision. Throughout U.S. political history, campaigns have employed various launch strategies with differing levels of success. Test your knowledge about one of the most successful and innovative campaign launch approaches that changed political marketing forever.

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Barack Obama's 2008 campaign, which announced via YouTube and built an unprecedented digital grassroots movement
Donald Trump's 2016 campaign, which leveraged Twitter to bypass traditional media channels
Hillary Clinton's 2016 campaign, which launched through a coordinated Instagram and Facebook strategy
Bernie Sanders' 2016 campaign, which pioneered Reddit and Slack organizing for launch momentum