"I disagree with the concept that somehow or another we're going to pack up 10, to 12, to 15 million people and ship them back to the country of origin. That's not going to happen"

Rick Perry is expressing his dispute with the concept of deporting countless immigrants from the United States. He thinks that it is not practical to deport such a large number of people, and that it would be a not practical and costly undertaking. He is most likely describing the present immigration argument in the United States, where some politicians have proposed mass deportations of undocumented immigrants. Perry is likely suggesting that rather of deporting millions of individuals, the United States need to focus on producing a more effective immigration system that permits immigrants to get in the country legally. He is likely promoting for a more gentle approach to migration reform, one that does not involve mass deportations.