Donald Trump doesn't understand the challenges with securing the border from illegal immigrants, said former Texas Gov. Rick Perry.

Perry responded on Sunday to the billionaire entertainer's recent comments that the Texas governor didn't do enough to secure the border while he was in charge of the state that has a 1,200-mile border with Mexico.

"We surged our law enforcement and National Guard," Perry said while on ABC's "This Week." "Executive experience really matters."

Perry also called Trump's controversial comments on Mexicans bringing drugs and crime across the border "offensive."

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