I think the real point got missed here.
The reason the politicians use immigration as a "divide and conquer" tool is votes, nothing more.
Immigrants, legal and otherwise, come here to change the rules, not abide by them, and to obtain benefits they have not earned.
While it is true there have been other societies around for centuries before us, not just here, there has been little if any social or economic development or growth, hence the attraction to come to the US.
Bush is a globalist who does not believe in a national identity or national security.
I have no issue with immigration BUT they chose to come here, then live by our rules.
We are not obligated to adopt islam or may 5, not are we required to tolerate MS-13 because of "racism".