With President Trump’s so-called “Liberation Day” of tariff implementation fast approaching, Senate Democrats are putting Republican support for some of those plans to the test by forcing a vote to nullify the emergency declaration that underpins the tariffs on Canada. A resolution authored by Virginia Democratic Sen. Tim Kaine would end the emergency declaration that Trump signed in February to implement tariffs on Canada as punishment for not doing enough to halt the flow of illegal drugs into the U.S. If the Senate passes the resolution, it would still need to be taken up by the Republican-controlled House. Kaine warned that tariffs on Canadian goods would ripple through the economy, making it more expensive to build homes and military ships. Republicans have watched with some unease as the president’s attempts to remake global trade have sent the stock market downward, but they have so far stood by Trump’s on-again-off-again threats to levy taxes on imported goods. Kaine's resolution offers them a potential off-ramp to the tariffs levied on Canadian imports, but Republican leaders are trying to keep senators in line by focusing on fentanyl that comes into the U.S. over its northern border. It was yet another example of how Trump is not only reorienting global economics, but upending his party’s longtime support for ideas like free trade. A small fraction of the fentanyl that comes into the U.S. enters from Canada. Customs and Border Protection seized 43 pounds of fentanyl at the northern border during the 2024 fiscal year, and since January, authorities have seized less than 1.5 pounds, according to federal data. Meanwhile, at the southern border, authorities seized over 21,000 pounds last year.