Costco if very blue, and I prefer to give my business to them. But, with gas prices the way they are, I am hesitant to drive 20 extra miles to get there. Also sort of goes against the environmentalist in me.
I am conflicted about Wal Mart. I know it is a strong supporter of the Republican party. However, I am SO restricted on time right now, that the convenience of being able to grocery shop, misc. shop, get an oil change, and do it all for cheap speaks very strongly to me right now.