Well that explains in a nutshell why the Cato Institute is so laughable. Countries most certainly do have a right to control what products are allowed in, or whether or not there's tariffs placed on them. We can debate till the cows come home what the policy should be, but to deny a country's right to regulate commerce is hilarious.
"A wise and frugal government, which shall restrain men from injuring one another, which shall leave them otherwise free to regulate their own pursuits of industry and improvement, and shall not take from the mouth of labor the bread it has earned: This is the sum of good government."
Thomas Jefferson, first Inaugural Address; March 4, 1801