Their viewership is cratering anyway, and has been for years. The internet, demographics, and streaming services are the big culprit. Their ideological woke nonsense is another.
“Trump” is giving management a handy excuse and cover to confront their woke employees and constituents, and to starting radically changing their costs structure and content output.
They would probably have been able to hold on to their audience a little bit longer if they followed the Carson/Leno formula.
But they weren't interested in making a profit by the time Colbert took over.