I have no problem with a bridge into America as long as it is guarded and we only allow invited guests across it. Plus I think a wall is not doable, we should just use land mines like we do on the Korean dmz. Might owe a few Hail Mary,s after this comment. ;)
Probably a few Our Fathers as well.
The minefield probably be cheaper, but misses the bigger problem: the failed state on our border. The head choppers in Mexico are trying to rival daesh in their butchery. Sooner or later it will need to be dealt with us. I merely suggest that if we’re stuck with the problem we should deal with it in the politically incorrect fashion that worked so well in the 19th century.