(Bloomberg) — The U.S. proposed rules to track aluminum imports more closely, in a move that could address industry demands to block Chinese supply that skirts tariffs.While the Trump administration’s import levies are aimed at protecting against excess foreign supply of the metal, concerns have persisted that aluminum from China — the world’s biggest producer — is still flooding into the market.That’s because some Chinese supply could first be sent to another nation that isn’t subject to the duties. It’s then melted and reformed before being shipped again, masking its true origin. Criticism about surplus metal entering the U.S. via […]