A ‘state actor’ is a private company that either acts on behalf of the government or has other special relationships with the government, which subject it to constitutional restrictions on government, including the First Amendment. Google’s YouTube, Facebook, and Twitter have been state actors since about 2010. They claimed to be neutral, non-discriminating in their political and scientific views and denied any political bias — until about a year ago. Then they reversed the narrative and said that they are private companies that can discriminate against whomever they want. I can list half a dozen ways in which they are state actors. The pressure on them from Democrat officials, asserted by Trump in his lawsuit, is one of them. Obamanet, or net neutrality, is another one. But most obviously, they became state actors when federal and state government agencies opened accounts on their platforms and started to use them for interaction with the public. By accepting (and luring) multiple government accounts, they became public forums and state actors.