This explains why Facebook and Twitter keep "accidentally banishing ads by conservatives

In a sometimes-heated hearing in Washington last April, 55 U.S. representatives questioned Facebook Inc. FB -0.92% Chief Executive Mark Zuckerberg about privacy concerns and leaked user data. In the week before the U.S. midterm elections, about two-thirds of those same representatives are spending campaign dollars advertising on Facebook.

Politicians’ enthusiasm for targeting potential voters and donors on Facebook cuts across party lines—as did their criticisms. Paul Tonko, a Democrat, told Mr. Zuckerberg at the time, “Users trusted Facebook to prioritize user privacy and data security, and that trust has been shattered.” Republican Tim Walberg expressed concern that Facebook was banning political content and advertising based on the views expressed in it.

Campaigns for both have subsequently sunk money into Facebook advertising, according to a tool Facebook recently released that allows anyone to look up ads for political campaigns and “issues of national importance.” Neither congressman’s campaign replied to requests for comment. 

There have been literally dozens of reports (documented with Facebook and Twitter notification of their decision to block particular ads), most of which were reversed with an apology. zOf course, the reversals take a week or so, and the election is next week.

Here’s one: Facebook apologizes for blocking Tennessee (Republican) U.S. Senatorial candidate Marsha Blackburn’s ad.

And another: Facebook blocks ad by California (Republican) candidate.

And so on and so on. We don’t need the Russians to shape our elections: Silcon Valley monopolists are doing the job for them.