WASHINGTON - Sen. Mike Lee (R-UT) sent a letter to the CEOs of Alphabet, Facebook, Squarespace, and Twitter Thursday asking each company to identify and justify their content moderation process.

“I am specifically concerned about corporations using their power unilaterally to silence opinions they dislike and thus warp the public debates their platforms present to the American people,” the letter reads.

Sen Lee goes on to ask the Big Tech CEOs 11 questions including:

“What content-moderation standards do you employ when you remove content from your platform, where the content does not violate state or federal laws?”

“How do you ensure that a content-moderation decision is not influenced by the personal beliefs or political views of the moderator?”

“If CDC guidance is the basis for removing content regarding COVID-19, is that standard apply consistently? For example, since the CDC says that it is safe for schools to open, do you remove content from your platform that opposes reopening schools?”

You can read the full letter here.