Again, if there had been a reasonable system in place to begin with, instead of Teddy Kennedy's bizarre family-reunification/lottery system, 90% of them would have waited on line, gotten a visa and bought a bus ticket to San Diego instead of paying a coyote to sneak them in.
Expelling them and then continuing with the exact same idiotic system we have now is nuts.
Control of one's borders is the first order of sovereignity, which is precisely why Mexico guards its southern border so jealously. EVERYTHING else is secondary.