I’m not sure any governor can do much. Federal courts have sided with Obama that immigration is a Federal issue. Sure, they can detain illegals and turn them over to the Feds, who will then let them go with a ticket to show up at an immigration hearing (har, har). And as long as they claim they are from central America they have the right to apply for asylum once they set foot on US territory. But in any case Perry’s gonna have problems with conservatives for suporting the Dream Act.
Then he needs to bring it to court