To be determined.
The point is to start anywhere they can and right away.
Given the purpose of the construction (National Security) such negative action would produce very bad optics for the prog administration.
It is not just the people of the State of Texas, it is the safety and security of the entire nation.
Such anti-American action (including an attempt to stop any construction) is far different than some obscure foreign policy
It is a matter that all Americans can easily understand.
Illegal aliens, drug trafficking and human trafficking, these are all things that everyday American Citizens know as border issues.
If they try to halt the construction bust them and get the documentation for 2022.
Other than that just build everywhere we can.
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No one would ever hear that story, well not no one but few people would know or care, mostly Freepers and their ilk.