Trump’s greatest ally in the coming election? Facebook | John Harris

The internet giant has exempted politics from regulations on falsehood. Good news for a candidacy built on lies

If you want to know why the worst president in US history currently stands a very good chance of winning again, consider a few facts. Donald Trump's re-election campaign is already in full flow, brimming with cash, drenching social media with targeted ads, and reaping oceans of data on voters.

The impeachment drama is, predictably enough, the perfect opportunity to put out material that plays to the idea of Trump as a noble maverick, struggling against the liberal conspiracy implied by his online questionnaires: "Do you agree that President Trump has done nothing wrong? Do you believe the Democrats will try and make up LIES to impeach the president?"