Gov. Gretchen Whitmer won't shut oil and gas pipeline but threatens to seize proceeds if owner Enbridge keeps it operating even as the energy giant gains first permits for replacement tunnel.

China imports face duties of up to 177%, 74% for those from Mexico in trade case initiated by the American Institute of Steel Construction.

Even with steel sticker-shock over, infrastructure and private-sector boom, and worker shortfalls, won't keep costs from rising.

Agreement lifts tariffs of 25% on steel and 10% on aluminum in place for almost a year.

An investigation into whether Canada, Mexico and China's imports are harming U.S.-based fabricators will continue.