Republicans are overly dependent on older voters and have essentially written off the Millennial generation for years, and probably completely with 4 years of Trump. 18-29 is a critical time in a person's life, where many views on the world, various issues and political parties are developed and hardened. The way the GOP has reacted to a changing America and how Millennials accept that is almost as if they implemented a strategy specifically to alienate future generations of voters post-Reagan.
Between the rapid growth of racial minorities, the decline of religion and Millennials eating up more and more of the electorate, Republicans should, imo, expect to see significant electoral problems in the early-mid 2020s, when Millennials come to make up at least half of actual voters.
It's hard to see how it will all play out, but Republicans shouldn't think that unified control and big downballot success right now means they have solid footing going into the future. Democrats probably thought the same in 1992/2008, and yet everything changed 2 years later.
And the new batch of kids seem to be even more Democratic. However, even a very conservative R attracted enough moderate minorities this time to build a big enough tent. Democrats seem to just seem to ne having a hard time finding people.
Ultimately, the question is whether the Democratic Party base is just not set up in a way to attract the most graceful people (maybe Republicans do well with relatively fewer skills because of the Gift of Gab and that helps them win elections?) and if so, can they overcome the recruitment and social skills deficit?
This is kind of a more thought out "Last guts finish last" thought expirement.
