Abortion is overwhelmingly employed by blacks who cant even figure out that it is genocide. Even after being told that by Supreme Court Justice Ginsberg.
The only thing Obama could possibly do that might lose him their support is to take away affirmative action jobs, or other entitlements.
I think the only thing Obama could to to lose their support is to tell them that the white man really doesn't wake up every morning to dream up some new way to keep black people down.