Which presidential campaign was the first to leverage microtargeting on social media to create tailored political advertisements based on user data and behaviors?

Modern political campaigns have undergone dramatic transformations in their marketing approaches, particularly with the rise of social media and data-driven strategies. The way candidates and governments communicate with citizens has shifted from traditional media to highly targeted digital outreach. This trivia question explores a significant milestone in the evolution of political digital marketing that changed how campaigns approach voter engagement.

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Barack Obama's 2008 campaign
Donald Trump's 2016 campaign with Cambridge Analytica
Hillary Clinton's 2016 campaign
Mitt Romney's 2012 campaign