From 2006 until he went full-commie, his ratings were flat, third amongst the three network late night talk shows. Meanwhile, those hosts moving left or seeming pro-Trump struck ratings gold and disaster, respectively:
Since using his child's medical condition to curry favor with other statists, Kimmel has made a horse race out of late night talk shows.
However, as stated in the aforementioned article, late night talk show hosts can go lefty to garner a temporal ratings bump, but they cannot avoid the inevitable:
All three late-night network shows have shed viewers in the 18-to-49 demographic over the last year
Jimmy Kimemel is the mayor of the third largest town on Melting Icebergville, and pretty soon he will be governing alongside Katie Couric in Hasbeendia. Enjoy the cash while you can.