Organized labor may be hurting, but it would be hard to tell from the amount of money that the four big postal unions are spending on this year’s presidential and congressional races. According to their most recent disclosure reports filed earlier this month, the four–through their political action committees–had shoveled about $9.6 million into the 2012 election cycle, already ahead of the $8.9 million total for 2010, a non-presidential election year, according to data compiled by the non-partisan Center for Responsive Politics. Accounting for more than half of the 2012 sum was the National Association of Letter Carriers, followed by the American Postal…