I've been harping on this issue for twenty years. When I first started, I simply thought it wrong to allow people to flow in who didn't belong here. But after watching the political vent of some of these people, plus realizing a potential for terrorists, I've come to the conclusion that that we are committing national suicide. There's no other term that describes what we are allowing to happen.
Call me Pollyanna (but don't call me Shirley), but this article leads me to the following:
1. the infiltration has been occurring (being attempted) for 20+ years,
2. we've had two successful terrorist attacks in that time,
3. we're addressing the threat and fairly succeeding.
Add to this the 'war on terror' and the 'axis of evil' and I think you've got the makings of a successful campaign.