Jack Dorsey said details would follow in November

Twitter is to ban all political advertising worldwide, saying that the reach of such messages “should be earned, not bought”.

CEO Jack Dorsey tweeted “While internet advertising is incredibly powerful and very effective for commercial advertisers, that power brings significant risks to politics.

Social media rival Facebook recently ruled out a ban on political ads.

News of the ban divided America’s political camps for the 2020 election.

Brad Parscale, manager of President Donald Trump’s re-election campaign, said the ban was “yet another attempt by the left to silence Trump and conservatives”.

But Bill Russo, spokesman for the campaign to elect Democratic front-runner Joe Biden, said: “When faced with a choice between ad dollars and the integrity of our democracy, it is encouraging that, for once, revenue did not win out.”