If history is any guide, Trump will trash the country so bad it will take the entire next Democratic administration to fix it so it can be handed over to the next incompetent Republican.
Hubert Humphrey once observed that since Democrats did better (at that time, at least) among those of lower economic means while Republicans did better among those with higher incomes, that when Republicans are in office, the economy does poorly, and thus since Americans are overall poorer they then vote in Democrats. Democrats improve the economy, but since Americans are then wealthier, they elect Republicans.
And so the cycle continues.
Also reminds me of Harry Truman's comment that if you want to live like a Republican, you need to vote Democratic.