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.
Under, the Monopolistic Competition, there are large number of firms that produce differentiated products which are close substitutes of each other. In other words, large sellers selling the products that are similar but not identical and compete with each other on other factors besides price.