President Trump has taken the extraordinary step of threatening to close down social media platforms.
The threat came after Twitter added fact-check links to his tweets for the first time.
The battle between the president and the social-media companies has been brewing for a time.
But now it feels as though an all-out war is looming between Donald Trump and Twitter ahead of the US presidential election, in November.
Last night, a couple of Trump tweets raging about “fraudulent” postal ballots in US elections featured – for some users but not all – a strapline linking to what Twitter called “facts about mail-in ballots.”
This then led to a page debunking the president’s claims but featuring articles from two organisations he regards as his sworn enemies, CNN and the Washington Post.
It took him no time to fight back, tweeting: “Twitter is completely stifling free speech, and I, as President, will not allow it to happen.”