Which presidential campaign was first to successfully implement a comprehensive big data strategy that used predictive analytics to micro-target voters across multiple digital platforms?

The landscape of political campaigns has been transformed by digital marketing strategies. Modern political campaigns now leverage sophisticated data analysis, social media targeting, and mobile engagement to reach voters in ways unimaginable just a few election cycles ago. This trivia question explores a pivotal moment in the evolution of digital political marketing that changed how campaigns approach voter outreach.

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Barack Obama's 2012 re-election campaign
Donald Trump's 2016 campaign
Hillary Clinton's 2016 campaign
Barack Obama's 2008 campaign