President Trump said Wednesday that he will “strongly regulate” or even “close down” social media platforms, one day after Twitter flagged two of his posts.

The president made the vow on Twitter after the social media platform added a message to the tweets that linked to a page disputing the accuracy of his posts.

Trump and other conservatives argue that social media is censuring or silencing their messages.

In the two flagged tweets, Trump warned that mail-in voting is ripe for fraud, particularly in California.

Trump, in response to Twitter fact-checking his tweets, tweeted Tuesday: “@Twitter is now interfering in the 2020 Presidential Election. They are saying my statement on Mail-In Ballots, which will lead to massive corruption and fraud, is incorrect, based on fact-checking by Fake News CNN and the Amazon Washington Post,” the president tweeted. “Twitter is completely stifling FREE SPEECH, and I, as President, will not allow it to happen!”