The U.S. Department of Commerce on Monday imposed an immediate 17.09% tariff on tomatoes imported into this country from Mexico. Most of the tomatoes sold in Arizona come from Mexico.

Mexico currently supplies around 70% of the U.S. tomato market, up from 30% two decades ago, according to the Florida Tomato Exchange.

President Donald Trump’s looming tariffs on Mexican tomatoes have Republicans divided. A 21% tariff on tomato imports from Mexico is set to take effect later this month, as the Trump administration believes doing so will allow U.