Sen. Josh Hawley (R-Mo.) and Rep. Matt Gaetz (R-Fla.) on Wednesday separately announced they were both working on legislation to strip Twitter of federal protections that ensure the company is not held liable for what is posted on its platform.

The lawmakers began work on legislation following Twitter’s decision to add warnings to two tweets by President Trump this week in which he railed against California’s decision to expand mail-in voting. Trump tweeted without evidence that mail-in voting could increase voter fraud.

Both Hawley and Gaetz argued that Twitter’s decision to flag the tweets called its legal liability protections under Section 230 of the Communications Decency Act into question. Section 230 protects social media platforms from facing lawsuits over what users post.

Hawley sent a letter to Twitter CEO Jack Dorsey on Wednesday questioning why the platform should be given Section 230 protections and tweeted that he would soon introduce legislation to end “government giveaways” under the legal shield.