That question is impossible to answer. By any conventional political measure, whether it is opinion polls, or experience of what can work and what cannot, the Trump campaign is over.
The Republican party has deserted him, women are now coming forward with groping tales, unwanted kisses and similar smut, the tax row continues to grumble deep down like a volcano soon to erupt and in any other country, certainly in Europe, Trump would have had to withdraw. Indeed in the Australian parliament, Australia is a faithful ally of the US, a motion branding him a ‘filthy slug’ was passed unanimously. This is all unknown territory in international politics, let alone the domestic set up in the US. Only is Moscow does his star continue to rise.
There are now three possibilities open to a world dazzled by what has become a spectacle rather than an election. Trump will win narrowly, Trump will lose big, or Trump, fearing humiliation emblazoned across the planet, will withdraw. I have absolutely no idea which is more likely, neither do I rule out something even more off the page.