McKay Coppins for The Atlantic:

In the coming days, thousands of pro-Trump poll watchers are set to fan out across battleground states—smartphones in hand—and post themselves outside voting locations to hunt for evidence of fraud. This “army” has been coached on what to look for, and instructed to record anything that seems suspicious. The Trump campaign says these videos will be used in potential legal challenges; critics say their sole purpose is to intimidate voters. But in recent conversations with a range of unnerved Democrats and researchers, I was offered another scenario: If the president decides to contest the election’s results, his campaign could let loose a blizzard of misleading, decontextualized video clips as “proof” that the vote can’t be trusted.