Some of these may seem outlandish and/or overlap, but what happens first:
1. The majority of the South (Texas through Virginia) will vote for a Democrat for President (EV)
2. The majority of the Northeast (Maryland through Maine) will vote for a Republican for President (EV)
3. Blacks will vote at least 20% for the Republican Nominee
4. Whites will vote at least 54% for the Democrat Nominee
5. Hispanics will vote at least 50% for the Republican Nominee
6. One of the West Coast states (WA, OR, CA), votes for a Republican before a Deep-South state (LA, MS, AL) votes for a Democrat
Feel free to add your own.
All of this points to realignments of both major political parties and that the states that are base supporters for either side would follow suit. Realignments are gradual. And they're complex. But what you didn't mention was why there would be realignment of today's two major parties. In fact, none of the Republican posters' fantasies—no doubt derived from a preference for the current Democratic party's base states in many thread about so-called Election Trends—have expressed cogent and compelling arguments for all this to end up happening. Instead, we get subjected to nonsense
imaginings.