There is nothing that the government can do to influence Facebook's news-ranking algorithm (even if it is a human editorial process), just like there is nothing

There is nothing that the government can do to influence Facebook's news-ranking algorithm (even if it is a human editorial process), just like there is nothing it can do to influence Google's PageRank or CNN's coverage of trivial and inconsequential events. Sending a letter accusing Facebook of liberal bias is like accusing Fox News of conservative bias. It accomplishes nothing, since any organization can easily justify its actions as free speech.