Republican Senator Josh Hawley (MO) wrote a letter to Twitter CEO Jack Dorsey, asking if his company deserves to continue receiving Section 230 legal immunity after editorializing and fact-checking President Donald Trump’s recent tweets.

Earlier this week, the President tweeted about the possibility of fraud in mail-in ballots, warning Americans that “mail boxes will be robbed, ballots will be forged & even illegally printed out & fraudulently signed.”

Soon after, Twitter added a “get the facts” link to the President’s tweet. The link was filled with numerous articles from establishment media such as CNN, New York Times, and The Washington Post, all of which were aimed to discredit Trump’s concerns.

Hawley reacted to the social media giant’s move, saying that their fact-check section raises serious speculations that Twitter only targeted the President for political reasons. The senator penned to Dorsey:

“Twitter’s unprecedented decision to single out the President for disfavor, based on his political speech, is alarming. Yesterday, for the first time ever, Twitter branded the President’s tweets with a “fact check” designed to encourage readers to believe that the President’s political speech was inaccurate.”

The senator added that the social media giant’s decision to editorialize the President’s tweet “raises questions” about why they should continue receiving special immunity from publisher liability.

Twitter is one of the few publishers that receive special legal immunity under Section 230 of the Communications Decency Act, which places social media platforms as “neutral” platforms. Hawley reminded Dorsey of his company’s special treatment, saying that Twitter is treated differently from other publishers, as traditional ones are held liable when they “mess up.” So Twitter’s fact-check move was totally out of its way as a “neutral” platform as it only showed news articles coming from left-wing media.

“Companies that act like publishers should be treated like publishers. Section 230 should not treat Twitter and neutral internet service providers in the same way when they function so differently,” Hawley concluded.