Which political campaign first pioneered the use of microtargeting based on big data analytics to customize messages to specific voter segments?

Modern political campaigns have transformed dramatically through digital marketing innovations. From Obama's groundbreaking social media strategy to the sophisticated data analytics of recent elections, technology has revolutionized how candidates connect with voters. Test your knowledge about a significant political marketing innovation that changed how campaigns operate in the digital age.

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Barack Obama's 2008 presidential campaign
George W. Bush's 2004 reelection campaign
Hillary Clinton's 2016 presidential campaign
Donald Trump's 2016 presidential campaign