They're coming to do the jobs that domestic terrorists just won't:

The US is concerned that Hamas and Hizbullah agents may penetrate the porous US-Mexican border in order to carry out terrorist attacks, according to Robert Grenier, the former head of the US Central Intelligence Agency's counterterrorism center... According to the US counterterrorism expert, American officials are concerned that terrorists will tap into illegal immigrant and/or drug trafficking networks in order to use them to bring people and equipment into the US. The former CIA official added that the American government is also fearful that Hamas and Hizbullah sleeper cells are already operational in Mexico;... According to this scenario, Iran could also use Hizbullah networks to hit the US on its own soil.

The best part? The Lebanese ex-pat community in Mexico both allows these cells to hide in plain sight and provides a fertile ground for recruitment. This isn't even a matter of US ports, which are vulnerable because so little of the traffic is screened. Security on the border is so pathetic that we simply don't know who's crossing or what they're carrying. The sheer volume of illegal traffic would make it impossible to screen anyway.

At least that traffic isn't set to spike during a Democratic administration that will make amnesty a forgone conclusion.

References:
* Expert: Hamas, Hizbullah cells may be active in Mexico [YNet]
* Reid to Azteca America forum: We’ll get your amnesty [Hot Air]

Previously:
* Memo To Mexico: UN Doesn't Have the Authority To Tell the US What To Do On Its Own Territory. At Least Not Yet.
* Surprise - Hillary's Future Secretary Of State Huge Fan Of "More Pressure On Israel"
* Initial, Visceral Bitterness - (1) Progressives Had A Great Night. Really Fantastic.