The comments ran counter to recent speculation about a possible deal when Trump meets Chinese President Xi Jinping at the G20 summit in Buenos Aires this week. China has not agreed to US President Trump's new trade parameters, and as a result, Trump is threatening an increase on the current tariffs and the addition of new ones. Some components, like the smartphone's glass cover, are manufactured in the US and shipped for assembly in China. Over the past six months, Trump has imposed import tariffs on Chinese products worth $250 billion and another round of an equal amount is ready to be imposed if there is no trade deal.
"Donald Trump's renewed tariff threats against China have magnetized investors to the USA dollar", Lukman Otunuga, a research analyst at broker FXTM, said in a note.
But the stock tumbled as much as 1.9% in after-hours trading following The Journal's interview with Trump.
The Journal added that Trump said tariffs could also be implemented on iPhones, which are assembled in China.
The Wall Street Journal said the administration has been anxious about a consumer reaction to such levies.
In September, Washington slapped 10 percent duties on $200bn in imports from China in an effort to get Beijing to reverse alleged unfair trade practices, such as the forced transfer of intellectual property and massive state intervention in markets. Chinese manufactured products account for 61.6% of the consumer electronics imported into America.
Trump told the WSJ that companies importing goods from China should move plants to the U.S. Apple builds its phones and laptops overseas, though many parts come from its home country. In September, the Trump administration announced a 10 per cent tariff on US$200 billion of Chinese goods, and said the rate will rise to 25 per cent on January 1.
When the WSJ asked if that includes handsets like the iPhone as well as notebook computers, he said "Depends on what the rate is, I can make it 10%, and people could stand that very easily". An Apple spokesman did not immediately respond to Reuters' queries.
All three major US indexes finished positive after spending much of the session in negative territory, as Kudlow said there is an opportunity to "turn the page" on a trade war with China.