Fool's hope?

I remember four years ago on the eve of the US presidential election, Republican Mitt Romney's team were going to such Democrat strongholds such as Minnesota (home state of Romney's VP Paul Ryan admittedly) and saying to the media, 'we're doing really well where no-one gave us chance'.  What happened?  Barack Obama outperformed Mitt Romney (and the polls) in the key states and won handsomely in the Electoral College.
As Trump's team campaign in Nevada, Michigan and North Carolina, word for word, they're saying exactly the same thing as Romney's in 2012.  Now, it's likely that Trump will take Iowa easily and squeak in for Ohio (goodbye bellwether status for both).  He may even win the Electoral College, if his base comes out and Hillary Clinton's doesn't (though the latter is unlikely given her vast ground game of getting out the vote over Trump's staffers).  The polls seem to point to a popular win for Clinton and also in the 'battleground' swing states.  So it seems that the pronouncements of Trump's team may be as delusional as of those who worked for Romney but we'll know soon enough if that's an accurate assessment.