In 1987, Milton Friedman published an article in the WSJ about how polls on Bork were being deliberately biased against him. The ideological gatekeepers have advanced far beyond this with search engines.
This scary documentary is available on Amazon Prime. It details the massive power of Google (Alphabet) and Facebook and their ability to shift elections to the Left. Particularly chilling is how Google can do it on search results in an indiscernible manner. I wondered why Google was able to act so blatantly using corporate resources on behalf of Obama in 2008; the documentary explains that its two top execs have controlling shares of the voting stock and thus, short of fraud, are pretty able to do whatever they want. Both of these companies are creatures of the Left and are using their powers to advance its agenda.