By Steven Greenhouse, New York Times/Business Day, Dec 26/27, 2012

[....] The dockworkers are flexing their muscles again, threatening a strike beginning Sunday that would shut seaports from Massachusetts to Texas. It would be the first such coastwide strike since a two-month walkout in 1977 paralyzed the flow of tens of billions of dollars of imports — and the nation’s retailers and other businesses fear a painful replay if the 14,500 dockworkers make good on their threats. [....]

The strike threat has so alarmed corporate America that more than 100 business groups wrote to President Obama last week to urge him to intervene to push the two sides to settle — and, if need be, to invoke his emergency powers under the 1947 Taft-Hartley Act to bar a strike. [....].

Despite their small numbers, the East Coast dockworkers have outsize influence. Many of them, like the crane operators who transfer containers from ships to the docks, are highly skilled and cannot be easily replaced. And because they control the loading and unloading of goods in most of the nation’s ports, a strike could cause extensive economic damage at a time when the economy is already weak.

“They’re in a crucial place in the flow of goods,” said Richard W. Hurd, an industrial relations professor at Cornell University. [....]