Presidential popularity can't go below 32%

President Obama has a built in 32% base of popularity. The 12% of the population which is black can see no wrong in what ever  the presidents policies may be , and understandably so, is a formidable block. The social progressives , rabid environmentalists and assorted progressives and liberals make upn another 20%.  The Republican candidate must therefore work with the remaining 68% of the electorate and try to put together a hodge podge assortment of interests from far right zealots , social conservatives , doctors, small businesses and fiscal conservatives. , it is like herding cats.It is some what amazing that a republican candidate stands a chance in a nationwide election whe he or she has to 51% out of that 68% .