A bigger story than it appears. The Trump campaign used vast amounts of illegally obtained personal data from Facebook in the 2016 election. And this is just the part we know about, and that people have admitted to. The biggest problem with these targeted ads is they are private and not open to scrutiny like other campaign ads. A quote:
The consulting firm, now defunct, worked for Donald Trump’s successful presidential campaign in 2016, and used personal information from millions of US Facebook accounts for the purposes of voter profiling and targeting.