Being the former governor of a state that borders Mexico, one of the messages Republican presidential candidate Rick Perry conveys to crowds and reporters is that he wants to fix the illegal immigration problem by securing the border. While addressing the Iowa State Fair audience on the soapbox stage on Wednesday,the former governor of Texas again outlined his plans for the border.

“We can’t just build a wall,” said Perry, hinting criticism of fellow contender Donald Trump’s vision to construct a massive wall in between the U.S. and Mexico. “That may be good political rhetoric, but the real focus is on how you are going to secure the border.”

Perry has repeatedly said in campaign stump speeches, and today with reporters pressing him, that he wants to beef up security personnel on the border.

“Lay it out and use your common sense about which one of these can happen quicker, which one is more effective,” Perry said. “If you just build a wall and you don’t have the other aspects, then all you’ve done is spend a lot of time and a lot of money.”

Perry went on to suggest more aerial monitoring as well.

“Aviation assets that can fly from Tijuana to El Paso to Brownsville,” said Perry. “That’s 1,933 miles. This is an incredibly long border and looking down 24/7 with the technology we have available today, identifying activities that are clearly illegal or suspicious and fast response teams that can go there at that particular point in time.”

The two-time presidential candidate also addressed his dropping campaign financial pool, saying he was not worried about it.

“We had the best week of fundraising last week that we’ve had since June,” said Perry, though he would not specify the exact amount. “There are people who can keep a pretty small footprint, and I’m one of them. I’m going everywhere, I’m not going anywhere.”

Perry said he will be traveling to South Carolina and New Hampshire next, and then return to Iowa in a few weeks.