Both supporters and opponents of the mortgage interest deduction are laying the groundwork in anticipation of a renewed post-election effort to significantly revise or even outright repeal a staple of middle-class homeownership as Washington is forced to grapple with tax reform and the looming “fiscal cliff.” A number of industry trade groups were reluctant to go on record but industry insiders say they are getting their facts and research together in anticipation of the first serious attempt to repeal the MID in two decades. The most critical factors that will dictate...