It seems to me and, from discussions on this list, it appears to a number of others here, that the historical and material semiotic elements of what so many derisively refer to as deconstruction look an awful lot like what folks on the left used to call ideology critique. The problem with even that stance, today, is that - painting in broad strokes - both the left and the right largely base their appeals on modern (or premodern) categories and relationships as they engage in ideology critique in world of fractured and unstable identities and partial and situated knowledges.
Hell, look at the debate here on Iran, go back and read the modes of production debate, take some time to review the arguments about feminist standpoint epistemologies, look at Marxist and post-structuralist science studies in re: the production of nature, the construction of science and the contradictions of technology... part of the problem the left has is that the categories we've traditionally used are largely in flux, are deeply contested and are no longer as easy to rank. Given global climate change, what do we prioritize and which we are we talking about? Given environmental injustice, ought we to be more concerned with wilderness, resources, parks, health, pollution, production, outdoor activities, or (urban, suburban, rural or Southern) aesthetics.
I think the left - whatever that actually means, today - largely imploded as a result of a lack of internal democracy and a surfeit of internal differentiation - at exactly the same time that its ever-so-partial-victories within social/liberal democracy can under virulent neoliberal political, fiscal and ideological attack AND at exactly the same time that the taken-for-granted economic, environmental and spatial conditions of the left became increasingly transformed by globalization. Pulling this all apart in order to produce a useful political narrative may in fact require deconstruction, even if it ought to completely avoid the kinds of texts-about-texts-about-texts-about-me navel gazing of late-80s/early-90s postmodernism.