On Friday afternoon, around the same time a delegation of senior Canadian officials was preparing to meet with President Donald’s Trump’s border czar in a bid to stave off withering new tariffs, Trump himself essentially told them from afar: Don’t bother.

Here are some things to know about Trump’s actions, the counters from U.S. trading partners and what it means for American consumers.

Mexico and Canada responded to the U.S. trade action with a 25% tariff against $155 billion worth of American goods as trade war kicks off next week.

Mexico has been preparing possible retaliatory tariffs on imports from the U.S., ranging from 5% to 20%, on pork, cheese, fresh produce, manufactured steel and aluminum, according