The President's tweet: "The Radical Left is in total command & control of Facebook, Instagram, Twitter and Google. The Administration is working to remedy this

The President's tweet: "The Radical Left is in total command & control of Facebook, Instagram, Twitter and Google. The Administration is working to remedy this illegal situation." I don't know of the radical left controlling Facebook, Instagram, etc., but these are all private companies. 1. Unless Congress enacts some legislation on who can or cannot say what on these websites, what specific power does the Executive branch have? 2. And if they do have the power, does this mean the next administration (if liberal) could technically censure Rush Limbaugh and Rush Hannity for not being "fair" (whatever that means)? Edit: I'm genuinely curious why the downvotes. Looks like I'm getting censured for asking a question that maybe isn't so convenient.