Which pioneering data analytics technique, borrowed from retail giants, was first successfully deployed at scale in the 2012 Obama presidential campaign?

Political campaigns have evolved dramatically in how they use retail data and demographics to target voters. Modern political operations function much like sophisticated retail operations, using big data to identify, segment, and persuade their 'customers' (voters). Test your knowledge about how political campaigns leverage retail-style data strategies to win elections in the digital age.

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Microtargeting with predictive scoring of individual voters based on consumer behavior patterns
Blockchain-based voter preference tracking through social media engagement
AR/VR simulations to predict voter turnout based on weather patterns
QR code-based real-time polling at campaign events with automated sentiment analysis