With a month to go until the only poll that matters, former President Donald Trump has roared back into a substantial lead in our election model. A slew of recent surveys has shown him with leads in key battleground states. And when the data are processed through our DailyMail.com/J.L. Partners model it shows the former president winning in 56.7 percent of the simulations.As ever, the road to the White House appears to run through Pennsylvania, with its 19 electoral college votes. For weeks it has been in 'tossup' territory. Now the model moves it to 'lean Trump' in what could...