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Top Secret by Skley (cc by-nd)

I fell down the rabbit hole of reading this CIA publication ...

Peeedro digs up interesting background on classified intelligence briefings to U.S. presidential candidates.

BEWARE of DOG by kennymatic (cc by)

You can mark houses visited/not-visited -- were they not visited because nobody was home? Scary dog? (literally has a spot for "scary dog, can't go to door") Do the same people still live there? Is the house on the market? Does the house have a foreclosure notice? It highlights if someone in the house has turned 18 since the last election -- do they still live there? Are they registered to vote?

Eyebrows McGee offers some first-hand insights on how the NGP VAN database works for candidates and and campaign workers.