Which presidential campaign first built a comprehensive voter database called 'Project Narwhal' that revolutionized how campaigns use big data for micro-targeting voters?

The landscape of political campaigning has been transformed by technology and data analytics. One particular campaign stands out as having revolutionized how voter data and social media were leveraged to create a new paradigm in political marketing. Test your knowledge about this groundbreaking campaign strategy that changed how political candidates approach voter outreach and engagement.

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