The Trump administration’s proposal to impose a 20 percent tariff on goods from Mexico, as well as other countries, would hit Americans hard. That’s because Mexico is the third-largest exporter of goods to the U.S., behind Canada and China. In 2015, the U.S. imported $295 billion worth of products from Mexico, according to the government trade data. The top category was cars and car parts, most of them owned by American automakers and intended for the U.S. market. The U.S...

The nation’s unemployment rate, which has hovered just below 5 percent since spring, plummeted to 4.6 percent in November, the Labor Department reported Friday. The U.S. economy added 178,000 jobs in last month.