Walmart , the world's largest retailer, will have to start raising prices later this month due to the high cost of tariffs, executives said on Thursday, in a clear signal that U.S. President Donald Trump's trade war is filtering through to the American economy.

It’s been a critical stretch for measuring how some of the country’s largest retailers are managing President Donald Trump’s elevated import tariffs, as multiple big name stores share their quarterly earnings reports.

The world’s largest retailer warned it’s facing a dynamic environment as it withheld a profit forecast for the current quarter.