The White House took aggressive aim at Amazon, with President Donald Trump putting in a call to Amazon founder Jeff Bezos Tuesday morning, after the company considered displaying the added cost of tariffs on certain items.

The White House press secretary, Karoline Leavitt, attacked the retail giant over a report that suggested Amazon would highlight tariff-related price increases. Amazon said it was “not going to happen.

The White House lashed out at Amazon on Tuesday for reportedly planning to display how much of a product’s cost comes from Trump’s tariffs. Doing so would emphasize to consumers that U.S. tariffs are not paid by overseas companies, but by the American companies importing the goods, and then largely passed on to customers.