President Donald Trump has been threatening a trade war with Canada. One contention is his charge that the markets of America’s northern neighbor are not truly open to many U.S. businesses. He promises trade turmoil until he feels that the northern border is more secure and American businesses are getting a fairer shake.

“Canada doesn’t even allow U.S. Banks to open or do business there. What’s that all about?” Trump asked in a Feb. 3 post on his Truth Social account. He complained about unspecified “many such things” before moving on to drug war concerns, and later opined that Canadians do not purchase enough U.S.-raised and -grown food for his liking.