Easy.
In Democrat districts, they win big. Think 90%.
In Republican Districts, they lose small. Think 48%.
if roughly the same number of districts, they could get overall a larger number of votes, but lose the majority of seats.
Exactly.
They will get crazy big wins in the urban areas they dominate.
But lose the rest of the country as they did in 2016.
Good sign they know the blue wave is bs.