You know, because those are potential Democratic voters.

Via HuffPo:

Homeland Security Secretary Janet Napolitano said on Tuesday that tying green cards to immigration reform would be counterproductive, throwing cold water on a key piece of the framework put forward by the so-called “gang of eight” in the Senate.

“I think that once people really look at the whole system and how it works, relying on one thing as a so-called ‘trigger’ is not the way to go,” she said at a Christian Science Monitor event. “There needs to be some kind of certainty in the bill so that people can know when they can legalize and then when the pathway to citizenship, earned citizenship, will open up.”

HT: Hot Air