This is the wrong argument I would say. If its economically the correct policy then all parties should be saying it and convincing the non-believers about the efficacy of the solution. Unfortunately there is no integrity in politics to do the right thing these days and so this will never happen. One party just opposes the other party's positions irrespective of whether they are good or not. Democrats are at least a bit better in that regard, they would not oppose the proposal outright, instead they try to criticize the implementation. Republicans on the other hand would argue (in unison) that killing babies is alright if the democrats say it's wrong.