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Opponents say the fee drives port costs higher and those costs are difficult to pass on to shippers.
The Korean liner company said it will continue to serve the Pacific Northwest region from Seattle.
The West Coast ports attributed "dramatic" downturn in volumes to congestion and lack of a ILWU labor contract.
Transpacific carriers cite port congestion and stronger demand as economy improves.
New style port directors are trying to tailor ports to industry supply chain needs.
Senate moves to decouple fight over immigration policy from Homeland Security, but resistance remains in House.