'Good fences make good neighbors'
The US government has the right to specify who, and how many, immigrants we will allow into our country, just as every other country on earth does. You want to attempt an exercise in futility... try to move to Mexico permanently!
'but it's too hard'... with the contruction methods that we have available, a simple security fence across rough ground is _not_ an impossible task.
'but they're just trying to make a living'... These people broke our laws getting here, and continue to break our laws by using false ID's, stolen SSN's, and a whole host of other crimes. Even simple daily activities such as driving (without a license, and without insurance) is AGAINST THE LAW.
'the fence won't work'... If it won't work, why is every open-borders group in the country dead set against them? A decent fence, with regular maintence, electronic monitoring, and regular patrols WILL END the huge stream of people invading our nation from the south.
Yes, I accept that a small number of creative individuals will manage to cross the fence. I also realize that in addition to the fence, we need to target employers who hire illegals, and state and local governments who provide them with benifits reserved for citizens. That doesn't change the fact that a good fence is a positive step towards securing our nations borders.
As far as the sudden support from politicians, it just lets us know that they are starting to listen to the people of this country, who are DEMANDING that the border be secured.