Romney draws immigration contrast with Perry

"Finally, we must stop providing the incentives that promote illegal immigration. As governor, I vetoed legislation that would have provided in-state tuition rates to illegal immigrants."

"There are places along the border that strategic fencing worked, particularly in the metropolitan areas," Perry said. "The idea that we're going to build a wall from El Paso to Brownsville doesn't make sense 'cause the fact of the matter is you know, number one, you'd never get it built, and it'd cost billions of dollars ... by the time you go from Tijuana to Brownsville." Perry said that he does support putting "boots on the ground" and using "aviation assets" (i.e. aerial drones) to secure the border.