Every 4 years the same stuff happens, and yet every 4 years there is a so called "paradigm shift" or "rubicon crossed", when actually, nothing has really changed. It's getting really cringe and predictable.
It does seem very likely that the Republican Party will govern the US for decades to come, like Perón's party has governed Argentina in between the military dictatorships, or Chávez's party governs Venezuela.
Either you're a troll, governed by recency bias (i.e. today), or not very competent in US politics. If the Democrats could get their act together even just slightly, they should have won 2016 and this election as well. How? It's simple demographics:
More and more people move to cities -> cities are typically blue -> easy for dems to get elected.
There should be absolutely no reason democrats lose so often and yet due to their incompetent antics they lose far more than they should.