Construction of first border wall segment to begin sooner than expected along Rio Grande

Chapman said his group is now counting on Democrats to halt expansion of the project.

“The Democrats in Congress up to now have been very unified as far as not appropriating money for the wall,” Chapman said. “Certainly there’s hope that will in fact happen.”

Trump made construction of a border wall between the U.S. and Mexico the signature promise of his political campaign and told supporters it would be solid concrete, 30 feet high and would stretch the length of the U.S.-Mexico border. Trump estimated it would cost perhaps $10 billion to $12 billion — and he vowed the Mexican government would pay the bill. Five days after his inauguration, he signed an executive order to begin the process.

Since then, the wall has faded from the headlines amid other controversies. But Trump has never ceased pursuing its construction, even as he has backed off the most bombastic of his demands.

In February, the CBP launched a bidding contest to build models for the new wall. Both solid concrete and alternative designs were allowed. The project is months behind schedule.  CBP officials recently said the winners will be announced in November.

Earlier in July, Trump told reporters on Air Force One that the wall should be see-through. Border patrol agents needed to be able to spot threats on the other side and avoid any “large sacks of drugs” thrown over the top. He also said he favors a wall with solar panels to generate energy and reduce the building cost.

He also opined that only 700 to 900 miles of wall may be needed. About 650 miles of the 2,000-mile long border already has some type of physical barrier. The remaining miles will be guarded by topography, the president said.

“You have mountains. You have some rivers that are violent and vicious. You have some areas that are so far away that you don’t really have people crossing,” he said.

It remains far from clear, however, whether Trump will be able to achieve even his scaled-down version of the wall. The current border fence, a far more modest project built mostly under President Obama, cost between $2.8 million to $3.9 million on average per mile, according to the Government Accountability Office. CBP previously announced that the agency has $20 million on hand for the current fiscal year.

Both Democratic and Republican lawmakers have balked at paying for the wall, which the Department of Homeland Security estimates would cost around $20 billion. Mexican officials have vigorously rejected any proposition of financing construction.

Trump, however, has already taken credit for beginning to fulfill his campaign promise.

“In a true sense, we’ve already started the wall,” he told the reporters.

Kiah Collier is with the Texas Tribune; T. Christian Miller is with ProPublica. This article published courtesy of the Texas Tribune, a nonpartisan, nonprofit media organization that informs Texans — and engages with them — about public policy, politics, government, and statewide issues.