I WAS Rubio's cheerleader here in Washington state and everyone wanted to start getting ready for the caucus in 2016 to help him win. We had state-wide, grass-roots set up and ready to go. Nearly 3/4ths (including myself) have requested to be taken off the list and no longer work for him. These are traditional, mainstream, long-time republicans. Former county chairs and those who gave Mitt Romney 38/43 delegates in 2012.
Rubio might be able to eek out a win for the nomination; however, he will get the volunteer support McCain got, in other words, none.
He ignored us. Completely. He dismissed us (almost to the point of calling us koo-koo birds but not quite to that level).