Workers at four plants vote yes, tipping the scales
                                
                                
                                    (Newser) -
                                    Auto workers at four Chrysler plants voted by significant margins to approve a new labor contract  yesterday, increasing the likelihood of final ratification by the company's 45,000 workers, despite rejection at several plants. The last vote, at a small-car plant in Illinois that employs 3,000 workers, is scheduled...