I tend to doubt that blacks are moving where Hispanics are thick on the ground, and that includes south Florida, and it appears to also be the case in Texas. In another decade, it may be impossible to draw a performing black CD in Texas. The DC metro area, and Atlanta, are probably the strongest magnets for them by far. That has made Virginia safe D, and Georgia will be the same in 5 years.
If you look at the data, that doesn't really track--quite a few of the counties pointed out by Pikachu, such as Maricopa or Harris are quite Latino.
Both of those counties are growing rapidly, so it's possible for their black populations to increase in absolute terms even if they're stable or falling as a percentage of the total.
