Perry made the initial claim in June during an interview with Fox News.
"We either have an incredibly inept administration, or they're in on this somehow or another. I mean I hate to be conspiratorial, but I mean how do you move that many people from Central America across Mexico and then into the United States without there being a fairly coordinated effort?" he asked.
On Sunday, Perry said that Obama needs "boots on the ground" at the border.
"What has to be addressed is the security of the border. You know that. I know that. The president of the United States knows that. I don't believe he particularly cares whether or not the border of the United States is -- is secure," Perry said. "Unless we secure our southern border, this is going to continue to be a massive amount of individuals that are coming to the United States."
This post has been updated.