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  • Mel Carnahan 2000 Senate Campaign Ad

    00:31
  • John Ashcroft 2000 Senate Campaign Ad

    00:29
  • Spencer Abraham 2000 Senate Campaign Ad

    00:30
  • NARAL's Anti-Gardner Senate Campaign Ad

    00:17
  • Cory Gardner 2014 Senate Campaign Ad

    00:29
  • Now Playing

    Mark Udall 2014 Senate Campaign Ad

    00:30
  • UP NEXT

    Thom Tillis 2014 Senate Campaign Ad

    00:30
  • Kay Hagan 2014 Senate Campaign Ad

    00:31
  • Jeanne Shaheen 2014 Senate Campaign Ad

    00:30
  • Scott Brown 2014 Senate Campaign Ad

    00:29

Mark Udall 2014 Senate Campaign Ad

00:30

To see the impact in how big data has changed political strategies, compare these ads from 2000 and 2014