Rubio has three fundamental problems now.
- With JEB gone, Trump & Cruz are going to go after him now
- Kaisch remains in the race to fight him in the mid-West
Rubio has spent 2/3rd's of all the money he has raised in just 3 states. He didn't come close to winning any of them. Unless he can convince big time donors to start writing some big checks, he simply doesn't have the resources to run a nationwide campaign.