Which presidential campaign was the first to use a dedicated mobile app that allowed volunteers to organize door-knocking routes and track voter contacts in real-time?

The digital landscape has transformed how political campaigns operate. From Barack Obama's revolutionary social media strategy in 2008 to modern sophisticated digital targeting, political campaigns have embraced innovative marketing approaches to reach voters. This trivia question explores a groundbreaking digital marketing moment that changed how political campaigns engage with constituents online. Test your knowledge about this pivotal intersection of technology and politics!

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