Probably because the RNC didn’t want him to win. The RNC is a friend to RINOs, not true conservatives and reformers like DeSantis. For this reason, send your campaign contributions directly to the candidate of your choice, not the RNC. They will use your money against you.
I have now.
The RNC has nothing to do with that one way or the other. Moreover, the current RNC leadership is Trump appointed. The RGA is in fact fully supporting DeSantis and their ads are already on the air.