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All this week, NPR is taking a look at the demographic changes that could reshape the political landscape in Texas over the next decade — and what that could mean for the rest of the country.
Texas is a large, diverse state with broad regional differences in population and demography. Its politics is subject to wild swings, too, depending on location. Take the 2012 presidential election, for example.
President Obama, who didn't contest the Lone Star State, got only 41 percent of the statewide vote last year. Compare that with the 57 percent of the vote received by former Massachusetts Gov. Mitt Romney, who also didn't devote any energy to Texas.
The map is staggeringly red, with Obama winning just 26 of the state's 254 counties, whose populations range from 4 million residents (Houston's Harris County) to 82 residents (rural Loving County):
Yet the above map can be deceptive because the population in many of Texas' counties is tiny. More than half of registered voters, for example, live in the 10 most populous counties. You can see the distribution in this map (below), which shows each county and its portion of the state's voters:
Romney's impressive margin shrinks, however, in the large counties. In those places, Obama split the vote with Romney, with each candidate receiving about 48 percent. And the margin changes slightly more in Obama's favor inside the five largest counties, which he won with about 52 percent.
Outside these urbanized areas, however, Democrats struggle. Romney won all the other counties with 70 percent of the vote on average.
This map (below) shows Obama's performance in all counties, with darker shades of blue representing higher proportions of the vote. You can see his support in the urban areas and the heavily Hispanic Rio Grande Valley, a rapidly growing section of the state, and the president's relative lack of support everywhere else:
Here's Romney's performance (below), with darker reds representing higher proportions of the vote. Note that this map has different vote ranges because the data distribution skews heavily toward large GOP margins in rural counties:
What could be heartening for Democrats, who haven't won a statewide race since the early days of the Clinton administration, is that the state is trending urban — and those places are starting to turn blue.
The bad news is that they're still getting clobbered in rural and exurban areas, and it could take many years to increase urban margins to high enough levels for them to compete in statewide elections.
Matt Stiles is data editor on NPR's News Applications team. Follow him on Twitter at @stiles.
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