I've been re-reading through this thread and have a couple of thoughts.
Firstly this is not a knock at the USA. . . . . ok?

Its just an observation.
Now, the USA has an illegal immigrant problem. What I can't understand is this - the US government is in the process of converting a whole country's dictatorship to a democracy - they are also concerned about another country creating a nuclear weapon. In fact the last concern is so great that oil prices have rocketed in the last week or so for fear of a US air strike.
Anyway, if the US government is able to spend hundreds of billions on the above. Why can't they spend money and sort out their home issues like immigration?, because from what I've read here, this is a worsening situation.
Or to put it another way - is there anything being done to sort this - or is there likely to be too much resistance from US big businesses who fund the party in power - therefore, just token things are done to make it look like they (government) are addressing it. Aiding illegals into the UK is big business, there must be many such illegal organisations aiding the US illegal people over the border.
Just to get our Ken going

- in fact I know there is because the A Team broke up one such organisation mis-treating Mexican illegal immigrants - so it must be true
Incidentally, most "western" countries have an illegal immigrant problem, its not just a US issue.
Australia has "boat people" from Hong Kong / Vietnam etc. Europe has the former "Iron Curtain" country and Mid Asian immigrants. In fact, they try to sneak onto the channel tunnel freight trains or hide in the back of lorries (trucks) to get in the UK. Or they try to get over the North Sea or the channel in flimsy boats.
Col