Dockworkers at ports from Maine to Texas have started walking picket lines 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 Eastern Time, (0400GMT) and even though progress was reported in talks on Monday, the workers went on strike early Tuesday. The strike is affecting 36 ports. The U.S. Maritime Alliance, which represents the ports, said Monday evening that both sides had moved off of their previous wage offers, but when picket lines went up just after midnight, it was apparent there was no deal.