Senator John Cornyn is calling for input from local stakeholders regarding the construction of a border barrier in Big Bend. He believes that local leaders, landowners, and park advocates should be heard before any further construction takes place. The senator's statement suggests that the concerns of Texans should be considered in the decision-making process.

It is not clear what specific concerns have been raised, but it is evident that Senator Cornyn wants to ensure that local voices are taken into account. For more information on this issue, readers can refer to the original report from Houston Public Media, which may provide further details on the construction plans and the concerns of local stakeholders.