This analysis in WaPo by political science Prof. Todd Eberly is interesting for several reasons. He acknowledges that the conventional wisdom - which said the House would be the easy part for SSM - has been "upended." He also points to Gov. O'Malley's recent backtracking, from supporting SSM to adopting Sam Arora's position: "Let the people decide."
All of this reflects the huge, unexpected outpouring of public opposition to gay marriage in deep-blue Maryland.