New York (CNN Business) President Donald Trump said Friday he wasn't concerned about Apple's future and again encouraged CEO Tim Cook to move his supply chain to the United States.

"Apple makes their product in China. I told Tim Cook, who's a friend of mine ... 'Make your products in the United States,'" Trump said. "China is the biggest beneficiary of Apple — not us."

"My focus is the United States. I want to get those companies to come back," he added. "I want Apple to make their iPhones and all of the great things that they make in the United States."

The iPhone is produced through a complex, global supply chain. Moving it out of China would be extremely difficult and highly unlikely.

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