Washington - Call it an appetizer, with the main course still to come. An independent conservative group says it's going up in some battleground states with a television commercial that's critical of President Barack Obama, one of the first of what could be many ads by similar groups on the right. Joe Wierzbecki, the executive director of the organization, tells CNN that the ad began running this weekend on television stations in Nevada, with ad time being purchased in Michigan and Wisconsin. Wierzbecki says his plan is to eventually also run the commercial in Colorado, Missouri and Ohio.The spot, titled