US President Donald Trump has finally taken the steps that he was threatening to right from his campaign days, namely, to block imports to trigger revival of the American manufacturing sector. He implemented the extra-ordinary decision to impose import tariffs of 25% and 10% on steel and aluminium, by invoking the provisions of Section 232 of the Trade Expansion Act of 1962. This provision allows the Administration to take measures to protect domestic industries for “national defense” and “national…