Like I said, in the end, results will matter. Maybe we can develop a mix of technology and boots on the ground and that could be as effective as a wall. And there is one basic problem with a wall - the damn enviros will tie it up for years, as they have done with the last section in the San Diego sector. I'd like to see a wall, but I'll settle for a serious effort to improve the current sieve.
Boots on the ground will never stop the flow and the American people know it. For one, the American people will not trust an executive branch that is very vocally open border to manage the efforts. A wall is a deterrent 24 hours a day and not susceptible to political interference.
Congress can easily pass legislation to handle any environmental concerns if they want to.