Definitely. Trump alludes to it but he needs to make exactly the case you are making. We are not building a brand new wall from scratch. Sure the new wall is bigger and better but we are augmenting and renovating wall that is already there. If a wall is so bad are the democrats suggesting we tear down what's there (maybe we shouldn't go there). :-)
Beto already went there.
Google Beto O’Rourke fences and you will get several links.