Despite the Trump Horror Show, it is conceivable that Trump could pull it off in general elections if he does very well with white working class voters (as he seems to be doing right now) in the Upper Midwest states.



HuffPost put it very well -

"To secure the presidency, Democrats only have to win the Northeast, the West Coast, and the Upper Midwest, including Iowa. Obama did far better, carrying every swing state in the country, including Florida and Virginia in the South, and Colorado, New Mexico and Nevada in the West."  

"But even with that massive margin, Obama could have been undone by victories for Republican rival Mitt Romney in just four states: Ohio, Pennsylvania, Michigan and Wisconsin. Together, those four Rust Belt states account for 64 electoral votes. Even if Floridians, Iowans, Coloradans and all of the other swing states had gone to Obama, his failure to capture the Upper Midwest would have been enough to hand the White House over to Romney."