Does a US President have the authority to address a national economic emergency? The simple answer, of course, is yes. There is no higher calling for a president than to protect the nation. But the question is actually trickier than it seems. There is good reason to believe that the simple answer may not be the best answer. This very question was raised about Donald Trump’s tariff strategy in a May 28 ruling by the US Court of International Trade (USCIT), now under appeal. It is hardl...