I think for the most part it's the two party system that causes us to see the separate solutions as opposite rather than the other way around. It's hard to think of the trump tax plan as the exact opposite of a democratic solution because it has some measures democrats originally liked and some they originally proposed (although the core thrust of it is quite republican). We also still have it be the case that the majority of motions in house or senate get bi-partisan up-down votes.