GSE critics are urging the Office of Federal Housing Enterprise Oversight to provide a tougher level of supervision over Fannie Mae and Freddie Mac that matches that of bank regulators, even though it doesn’t have the resources of such agencies. “OFHEO is severely constrained under current law, but given the huge size of the government-sponsored enterprises and the potential for serious systemic risk, OFHEO can and should do all within its power under current…