Not surprised at how many people are on the Safe R WI train , but I'm stunned at how few people have said Michigan. In Wisconsin and Pennsylvania, growth in the urban areas can at least keep Democrats competitive there. In Michigan, unless the population decline reverses in Detroit, Democrats won't have any way to offset their losses in the rural parts of the state (assuming those losses are permanent, which this thread seems to assume.)
As a Democrat, I'm the most worried about Michigan long-term, and probably the least worried about Pennsylvania. Although in the short term, I think Michigan is the most likely to flip (in 2020) followed by Wisconsin, then Pennsylvania.
This. But Democrats have good news in Michigan: Some liberal areas such as Grand Rapids and the college areas are growing, and Detroit's population loss will probably reverse in around 10 or so years.
I actually don't think any of these sates will be Safe R by the 2030's, but swing states with a slight Republican lean/