Once you’ve become a politically vulnerable target in Washington, it seems critics come out of the woodwork to take their shots. The National Legal Policy Center, an advocacy group critical of Jesse Jackson’s Rainbow/PUSH Coalition, has decided that Freddie’s recent troubles provide a favorable climate to criticize the GSE’s funding of Jackson’s operation. Policy Center President Peter Flaherty sent a letter to Freddie June 18 that asked the beleaguered GSE to withdraw the financial