CQ Roll Call has acquired the Federal News Service from The Dolan Co. for an undisclosed sum. Minneapolis-based Dolan publishes Twin Cities newspapers Finance & Commerce and Politics in Minnesota as well as business and legal publications nationwide. It also stages industry events. Selling FNS will allow the company to focus on growth of its strategic businesses, the company said. Dolan acquired FNS in 2010. Keith White, CQ Roll Call executive vice president and managing director, says the acquisition…