Texas Attorney General Ken Paxton issued civil investigative demands into some of Big Tech’s power players after companies such as Google and Apple dropped Parler, a social media app popular among conservatives, from their platforms.

Paxton, a Republican, issued CIDs to Google, Facebook, Twitter, Amazon Web Services, and Apple on Wednesday, according to a press release, “asking the companies for their policies and practices regarding content moderation and, more specifically, for information related to Parler, a social media application recently terminated or blocked by Google, Amazon, and Apple.”