The Senate is passing legislation that would nullify U.S. tariffs on Canada. It is happening just as President Donald Trump is engaged in trade talks in Asia as well as an increasingly bitter trade spat with U.

The Senate passed a resolution aimed at ending President Donald Trump’s tariffs on Canada, with four Republicans joining Democrats to rebuke the administration’s trade policies a day after they voted to terminate tariffs on Brazil.

Donald Trump has issued a warning to Canada after he condemned an ad by the Ontario government that used former president Ronald Reagan’s voice to criticize tariffs.