Donald Trump has threatened to close down social media platforms that do not support his agenda, a day after Twitter posted a fact-checking notice on one of his tweets.

Axar.az reports that social media firms suppressed conservative points of view, the president claimed without providing any evidence, before saying his administration would “strongly regulate (the companies) or close them down, before we can ever allow this to happen”.

Mr Trump advised the companies to “Clean up your act, NOW!!!!”.

It is unclear whether the president’s professed goal would be compatible with the first amendment to the US constitution.