I am very, very, familiar with this response from 'progressives' in support of Obama. I usually adopt the following argument, and it carries great weight for you must remember that 'progressives' are emotionally leftist, but politically centrist. Anyway, my argument:
I will easily grant that Obama will produce better material benefits than McCain. No arguments here on this point. But one must look at the 2008 presidential election in light of a greater perspective. The United States is a capitalist, imperialist nation (most progressives will accept this claim, if they do, it's over - the argument is yours). Given that this is the case, and Obama has already stated that he will continue US imperialism (Afghanistan is a fine example) as well as capitalism, and hence one must look not at Obama himself, but at the systems of capitalism and imperialism.
At this point, I tend to generalize because progressives are not prepared to be lectured in Marxism - they need simple arguments which will strike emotional chords. I take the following approach:
Capitalism necessarily involves the systematic and widespread oppression and exploitation of millions of individuals within the US, and billions worldwide. This is not difficult to see (if they ask, provide a simple explanation of surplus value and wage slavery). Furthermore, Obama will only occupy the directorial seat within a system of exploitation and oppression. And given that this is a republic, you are endorsing this systematic and widespread exploitation and oppression with your vote. I cannot do this as I am opposed to exploitation and oppression (this last line should really work them over for it implies that they are not opposed to exploitation and oppression - which they aren't politically, but are emotionally).
Basically, you are asking them to be coherent individuals.
They are obviously a potential source, for they are highly emotionally attached to the notions of "freedom," "democracy," and "equality." They merely occupy a reformist, usually bourgeois perspective on the system of capitalism. This can be changed by proper argumentation (as elaborated above). You must remember that they are not prepared for a lecture in Marxism, such an approach will inevitably lead to failure. You must change their perspective, and then guide them into leftist theory.
- August