The tech giant has become a frequent Trump target in his push to force companies to bring more manufacturing jobs to the US.
Apple makes most of its iPhones in China and has no domestic smartphone production.
The company has promised to hire more workers in the US and pledged to spend billions domestically over the next four years. The supply chain for Apple’s popular phones has been concentrated in China for years.
Apple did not immediately respond to a request for comment on Trump’s threat.