Your sources seem fairly reputable, but I quickly found data to contradict them.
The U.S. Census Department claims that there are 25 million voting-aged citizens in California. There are only 18 million voter registrations in California. About 13.2 million of those voted. That’s not much more than half of eligible voters.
It’s something circulating on social media. Guess I’ll avoid social media sharing in the future!
I look at FR as a place that actual journalists can look for possible stories. They’ll then do the research (their jobs) and spread the story from there.
That does seem odd a million+ folks went to vote solely for the presidential race.
Trump is trying to get to the bottom of it. California would be a good place to start for possible voter fraud.