"I am confident we can fullfil the promise of Brexit and build a Britain that is stronger, fairer and more prosperous than it is today." This is what May will be saying today, and therein is the problem for her. A huge swathe of voters do not see their treatment from this government as being fair, and if it is so prosperous why are they not seeing a decent life. Her claim that the UK will be wealthier is at odds with warnings from a number of independent forecasters. The Office for Budget Responsibility has warned Brexit will "reduce growth in exports and imports" and has revised down growth forecasts for the economy. Many people who do not understand economics will however understand that all she is offering is more of the same, with additional measures to raise even more from them. This election was not needed, and shows up how ill prepared the Tory party was for it.
The office for budget responsibility has already had to apologise twice for being too pessimistic on UK growth since the defining Brexit vote. Many people who do not understand economics vote Labour.
Many pollsters have rubbished the recent YouGov poll, let us wait and see how many prefer the present government to the risky alternative.