For the sake of his relationship, Chicagoan John Mendoza said, he needed to learn how to cook. So just before Thanksgiving, he went shopping for some major kitchen appliances. With incoming President Donald Trump promising to impose tariffs on imported goods, economists say shoppers soon might be looking at higher prices on big-ticket items. But that didn’t figure into Mendoza’s thinking — yet. “I need an idiot-proof stove,” he said.