You can’t save DeSantis.
The polling numbers speak for themselves.
But—if you think otherwise go ahead and volunteer for his campaign in whatever state you wish.
Duh.
The race is effectively over. DeSantis needed to win Iowa to develop any sort of momentum. He didn't. Haley needs to win NH to develop any sort of momentum. She won't. Barring an Act of God, Trump will dominate every other state and handily win the GOP nomination.
But, God does have that veto power.