Why are the Trump defectors having such little impact on the polls and Trump's chances?

Again, I will try to keep this short but am happy to elaborate.

Perhaps the largest problem facing the black community is the failure of the black nuclear family; Black kids are the most likely to be raised in single parent households by a wide margin. Blacks are most likely to become teen parents. Blacks are the most likely to have a parent in jail or prison. Blacks have the lowest marriage rate. Blacks have the most sexual partners, and most unintended pregnancies.

The politically correct, ineffectual solution to these problems is to “fight back against systemic racism and inequality.” The necessary, more effectual and more difficult and painful solution is to build a culture of accountability in the black community. To enhance the self-efficacy of it’s young men and women. To shift the focus away from the “racist out there in North Dakota” and on to the improvement of the black family (and by extension the community) itself.

But even broaching these conversations in public is dangerous now. Anyone who does so risks being called a bigot, a racist, an Uncle Tom. As a black man, and as the president of the USA, Barack Obama was (and still is to some extent) one of the few people that could address what is at the core of the problems plaguing the black community. He is one of the only people in the world with the political capital, visibility, and tact in the position to do it.