Musing of one thinking about the guy who checked in to an upscale hotel on the East Coast, went to his room, opened a folder marked local attractions and found a copy of an IRS instructions for line-dancing...

I think Congress is going at the border thing the wrong way.  They are providing a line of defense and when that happens the opponent will look for ways to get over, under, around, or through it.  What they need to do is provide a strong disincentive so that people won't want to come in the first place.  An example would be no public assistance of any kind to those who cannot show legal residence.  A second disincentive would be to provide that children born here of parents here illegally would not be legal US citizens (this is consonant with what the Supreme Court said way back in 1893).  I think that once would-be illegal immigrants learn of such disincentives, they would not be inclined to get into the US.  I do believe that the border defense should be set up anyway because some people are bound to try entry in the hope of some kind of gain. 

I'm not familiar with the details of the immigration bill currently in the US Senate.  But it seems to be concerned with legalizing the status of people already here rather than preventing more from coming in.