Very much of the border is private land. The issue is the govt. does what it does best, over think, over regulate and over reach. The land requirements for a wall would include roads, buildings, water , etc. to satisfy the myriad of agencies that stick their nose - and our money, into a fairly simple need, making it out of reach and out of the question for the property owner that would have to give up the land. I worked a ranch in W. Texas that was 52 sections of land, it ended at the border and was accessible only by horse - or chopper, when the sensors lit up 10 miles away, the BP had to load horses, call us to come 8 miles to the road and open 3 gates, they then drive to the main compound, unloaded the critters and ride South - not a very effective system. The ranch had two outlying buildings for our use, we found that a couple rounds placed over the heads of anyone sighted on the property tended to cause the routes to change, the same actions on the border would slow the crossings to a trickle, but progressive/ communist entrenched leadership would sue the property owners out of existence - never mind that the problem was solved, which is the LAST thing the prog/commies want. In the 80`s, in just that County, BP caught 100 wets a month, they estimated they caught 1 in 10. My guess is those numbers have risen exponentially. Congress is the last group that has any chance of solving the problem.

I agree with the call for congressional action, but the "securing the border" is political. The borders have been getting more secure, resulting in fewer illegal crossings, for decades, and I am confident the gov't will continue that trend. It's a problem already being addressed. The problem is looking the other way. I don't understand "sanctuary cities", but it sounds like codifying looking the other way. I think it's bad on so many levels:
1. Creates an underclass. Who wants that besides those exploiting them?
2. Erodes respect for the law. Imagine being someone going through the process legally.
3. Makes it harder to accept refugees/immigrants because we're absorbing immigrants who came without permission.

I agree with their call for congressional action. It's not on the border, though. They're doing a decent job on that already. We need to stop looking the other way.