Continued from page 1

Mr. Angle, who served as the chief of staff for former Texas congressman Martin Frost, said that could make a big difference.

“We don’t need the Obama administration to be particularly aggressive at all. We just need the Justice Department to make sure the new districts are fair,” he said. “If they just play it down the middle, Democrats in Texas will have a shot at winning all four seats.”

Other analysts don’t see that happening — even if the Justice Department gets involved.

Columbia University professor Rodolfo de la Garza, author of “The Future of the Voting Rights Act,” said the Obama administration will have to mount a vigorous effort to defend minority voting rights because “without them, Democrats are dead.”

But he predicted that the Republicans in Texas, backed by sophisticated new digital demographic computer models, will do just enough to avoid running afoul of the federal government.

The only other state picking up more than one House seat is Florida, which will add two new districts. As in Texas, Republicans control the legislature and the governorship.

But most analysts say Republicans will have a much tougher time dominating in Florida.

In a state where registered Democrats still outnumber Republicans, Democrats hold only six of the state’s 25 congressional seats. That disconnect may be unsustainable over the long haul and could limit the GOP’s short-term hopes of padding its advantage.

“If you just look at things like voter registration, you have to wonder if this isn’t the high-water mark for Republicans,” said Aubrey Jewett, a political science professor at the University of Central Florida. “In a state that has more Democrats than Republicans, how many more districts can you carve out?”