Dockworkers at dozens of U.S. ports are digging in for a massive pay increase, seeking to flex their power in a strike that aims to strangle the flow of trade across much of the country.“This is going down in history what we’re doing here,

Dockworkers at ports from Maine to Texas began walking picket lines early Tuesday in a strike over wages and automation that could reignite inflation and cause shortages of goods if it goes on more than a few weeks.

The contract between the ports and about 45,000 members of the International Longshoremen’s Association expired at midnight, and even though progress