Limbaugh could sell the new Mac to conservatives, no problem. The problem would be that liberals would then boycott Apple because Rush was promoting the brand.
What Apple could do is get Rush Limbaugh to sell the new Mac to conservatives. Then, to forestall a liberal boycott, Apple could get Al Franken to sell the new Mac to liberals... for however long his radio program lasts. ;)
If that will work like the orange juice boycott the NAGs attempted in Florida I would buy Apple stock as soon as the promotion agreement is announced.