I don’t know what the actual numbers are, and I am committed to voting for the Republican - whether it’s him or Cruz, unless the GOP invalidates all those out there who have voted for either of them.
That said, I do think there are a significant number of people who would vote for Trump, but won’t say so publicly for fear of being politically incorrect. For that matter, I think there are a fair number of people who probably feel the same way about openly admitting to support for Cruz. Those on the left are not at all shy to say who they support, even if it were Stalin. Curious.
I met just such a man the other day. I asked him who he was leaning towards, and he said:
"Well... you're probably going to say I'm crazy, but I'm leaning towards Trump."
Once he knew I was on the Trump Train, it became clear that he wasn't merely leaning towards Trump, he was fully committed. But yes, he was embarrassed to admit it at first.