Here's a Democratic landslide based on a caricature of present trends:
Unless something in our economy happens to disrupt the disconnect between large/connected metros and the rest of the country, especially the small towns and cities of the Midwest, I doubt that we'll see Republicans improving in the former or Democrats improving in the latter.
Playing Devil's advocate, Trump won Wyoming by 118,000 votes. Weld County, CO has added 133,000 residents over the past 18 years. If the I-25 sprawl swallows up Cheyenne, it wouldn't take very long to make the state competitive.
That is a bit of a stretch considering how much Wyoming would need to grow in order to cover that margin (it ism't like those going into Weld are heavily Democratic). Larimer is a Democratic leaning area and perhaps I see that picking up, but Weld and the new transplants there certainly have a ways to go, so even if they I-25 sprawl makes it to Cheyenne it probably isn't going to be Democratic enough to make the state competitive. On top of that most of the growth in the I-25 corridor north of Denver is from Fort Collins and Greely on south. The growth is much less limited as you get north of there.
