re: Explain to me how 2020 is different than 2018

Look at election history. It usually goes like this:

1. New Party takes over White House
2. 2 years later, New Party gets hammered in Mid Terms
3. 2 years later, New Party easily wins re-election
4. 2 years later, New Party is mired in Lame Duck apathy or scandal
5. 2 years later, New Party 2.0 takes over the White House

Repeat cycle.