Which digital marketing innovation first allowed a U.S. presidential campaign to raise over $500 million online from small donors?

Political campaigns have transformed dramatically with the advent of digital marketing. From traditional rallies and television ads to sophisticated social media strategies and data-driven microtargeting, the way candidates reach voters has evolved significantly. Test your knowledge about a groundbreaking digital marketing innovation that changed how political campaigns operate in the modern era.

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Barack Obama's 2008 campaign's custom online fundraising platform
Donald Trump's 2016 Facebook microtargeting strategy
Howard Dean's 2004 Meetup.com grassroots organizing
Hillary Clinton's 2016 email marketing automation system