U.S. importers seeking relief from bottlenecks at West Coast gateways are triggering new backups at East Coast and Gulf Coast ports, adding to strains on the country’s troubled supply chains. Backups of dozens of container ships have formed off ports in New York, Houston and Savannah, Ga., authorities said, even as the lineup of vessels waiting to get into the neighboring ports of Los Angeles and Long Beach has dwindled from an armada that once counted more than 100 ships. The queue at the Port of New York and New Jersey, the largest gateway on the East Coast, has reached about 20 vessels, while about 40 container ships were waiting recently off the coast’s second-largest gateway at the Port of Savannah. Port Houston, a growing destination for ships from Asia traveling through the Panama Canal, counted a […]