We massive amounts of private land all the time foe public use. Have ever been tot he US Mexico border and seen the land we are talking about? This land runs through areas where is land is the one resource they have in abundance.
The idea argument that the democrats and refusing to give because they don't want to spend the money is so thin I don't know how people use it with out blushing in shame. The shutdown is going to end costing more than the wall ever would.
I personally don't think the wall will work but the people supporting it do and I can at least respect that they are taking principled stance an issue they believe will protect the country. The left on the other hand seem willing to shut down the government because they hate Trump and because they long term plan to win control of the country is changing the demographics.