Main article: List of John McCain presidential campaign staff members, 2008. On July 2, 2008, Steve Schmidt was given full operational control of McCain's campaign. Schmidt had managed Arnold Schwarzenegger's 2006 re-election and was a top Dick Cheney aide.
Monopolistic competition. The model of monopolistic competition describes a common market structure in which firms have many competitors, but each one sells a slightly different product.
Essential features and causes of monopolistic competition are as follows: Essential Features 1. Products are differentiated but close substitutes: The products of different firms are differentiated and are commonly known by brand names or trademarks. There may be difference of quality, packing and design.