Federal regulators have forced Fannie Mae to suspend its controversial acquisition, development and construction residential loan program. First approved by the Department of Housing and Urban Development more than 10 years ago, Fannie’s ADC has been strongly supported by homebuilders but has been a lightening rod for critics who say the government-sponsored enterprises have roamed beyond their mandates. Banks, in particular, have argued there is no need for Fannie to elbow its way into the…