Jaime Chamberlain is a fan of President Trump, but Trump isn’t making things easy on him.

Chamberlain is president of Nogales, Ariz.-based J-C Distributing Inc., which imports produce from Mexican farmers for sale in the United States. Trump’s recent threat to slap tariffs of up to 25% on Mexican goods to force the Mexican government to crack down on immigration caused Chamberlain a week and a half of anxiety.