Tariffs on China are set to begin on Tuesday, and Trump has signaled he will impose duties on other trading partners as well. "The kind of broad-based tariffs that were announced over the weekend, one would expect to have an impact on prices," Boston Fed President Susan Collins said in an interview with CNBC, adding that "with broad-based tariffs, you actually would not only see increases in prices of final goods, but also a number of intermediate goods." Little modern experience on how mega-tariffs impact the economy makes it hard for the Fed to know exactly how big or long-lasting the effects will be, she said, noting that it is possible the Fed could even shrug off a one-time increase in inflation tied to the tariffs.