Wall Strreet Journal: A program that would provide up to $4,500 in government-funded discounts to consumers who trade in an old car could provide a much-needed boost to the auto industry. The “cash for clunkers” program, which cleared a key hurdle late Thursday, would allow consumers to buy a wide range of vehicles — including large pickup trucks — with the government money when they scrap an older, less-efficient model. Congressional leaders attached legislation for the program to a must-pass …