The last decade hasn’t been kind to majority-black congressional districts across the country.

While the black population nationally ticked up 12 percent in the just-released Census numbers, eight of the top 10 majority-black districts across the country actually experienced population loss, losing an average of more than 10 percent of their black population, according to a review of Census data by The Fix.

Many of these districts lost voters of other races too, and are now in need of significant expansion during this year’s redistricting process.

The population loss is really more of a migration. The black population is moving from the major metropolitan areas – where most of these districts are – and into the suburbs. In fact, of the 15 districts with the greatest black population growth over the last decade, all of them are in the suburbs of these metro areas.

And that could play right into the hands of a Republican Party that controls redistricting in an unprecedented number of states and will be drawing many of these districts.

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“Without question, the last election came at a perfect time for Republicans in terms of taking control of a lot of state legislatures that they hadn’t before,” said David Bositis, an expert on race and politics at the Joint Center for Political and Economic Studies. “But the underlying fact is that, if you look at population growth of the U.S. over last 10 years, almost all of the growth came in minority communities.”

Read more at The Washington Post.