Workers from 31 plants opted to walk out after talks between the company and the United Auto Workers Union (UAW) hit an impasse as they tried to negotiate a replacement agreement when the manufacturer's four-year contract with workers expired. How long the labor action might last was uncertain. " The strike can take a little while longer, " Brian Rothenberg, a spokesman for the powerful union, told AFP. He said that only two percent of issues under negotiation had been agreed upon. " We have to find common ground on 98 percent of the remaining issues, " he said, after the strike began at midnight Sunday, with placard-waving strikers forming picket lines outside assembly plants. Talks were due to resume later in the morning, UAW officials said. Car production at the Detroit giant, which was saved by a multi-billion dollar bailout from the Obama administration after the 2008 economic crash, was brought to a complete standstill on Monday, Rothenberg said. On W