Fact-check: Nick Shirley's viral video, can you use a P.O. box to vote?

SAN DIEGO, Calif. (FOX 5/KUSI) — A video of political influencer Nick Shirley alleging voter fraud in San Diego went viral on Saturday, even being reposted by Donald Trump Jr. In the video, which has amassed over five million views, Shirley claimed that over 30 people registered a P.O. box in a UPS store at [...]