Because the whole issue is a red herring, tossed up by Rats to divide the Right, and Trump refuses to buy into it. Because the issue, per se, on its own, is being divorced from its legal and cultural environment, its ramifications such as enforcement limitations, etc, because it addresses such a small part of the population.
Trump is therefore waiting to see if the fallout makes it an issue that won't distract from his attack on Hillary. Hillary is becoming front and center - anything that distracts from that is suspect of being a diversion attempt by her. Especially any subject that splits the Right, but not the Left, like this one does.
In short, Trump is guarding his fuel and staying on target towards Hillary. Of course, that's why Cruz is trying to make it as big as possible - he's running interference for Hillary. That's why he doesn't drop out, even though he can't win - to help Hillary.
It seems like it wouldn’t be a big deal if women really don’t care, at least business wise. But man I didn’t think we were that far gone culturally. But I have a hard time imagining Trump doesn’t know what his women customers would be down for, so he might be right about this as a business decision.
As far as politically, all the blue collar dems I have spoken to about it think the dem leadership is whacked out on this issue. They know that men’s sexual attractions are different from women’s.
Freegards