Retail sales fell sharply in May as consumers pulled back after a sharp increase in spending in March to get ahead of President Donald Trump’s sweeping tariffs on nearly all imports.

Retail sales dropped 0.9% in May, marking the steepest decline since January, according to the Commerce Department. This cooling trend follows a small 0.1% drop in April and comes after a 1.5% spike in March.

Consumer spending is responsible for more than two-thirds of gross domestic product in the U.S. The gauge of the engine is, in this case, retail sales, which declined 0.9% from April, according to data out Tuesday morning from the Census Bureau.