The Supreme Court just took away Trump’s go-to foreign policy weapon.

President Donald Trump’s approach to foreign policy so far has been to speak loudly and carry a big stick. On Friday, the Supreme Court took away his favorite stick.

From Cuba, to China, to Greenland, it’s not an exaggeration to say that tariffs are the default foreign policy tool of the second Trump administration. He has regularly used them to threaten allies, isolate enemies, and demand…