I don't trust Jeb's people not to pull something dishonest, and I don't trust ANY of the others not to pull back room deals with Jeb if it's to their benefit.
Jeb has a small constituency in Florida, as does Rubio, though his is smaller. They are with the people who still have “fond” memories of the 80’s and 90’s GOP/small C conservatism (compassionate). However, there is also a groundswell of people who are very disappointed in what has happened in this country over the last 20 hrs, and what has happened to the GOP, Congress, etc., and see the world very differently for the threats as they are. They are supporting Trump and Cruz.