(Corrects spelling of IUB spokesperson’s name in paragraph 14) By Leah Douglas (Reuters) -Summit Carbon Solutions, the company behind a huge carbon pipeline proposal in the U.S. Midwest, has close ties to Iowa officials and regulators charged with approving a large part of its route, according to a Reuters review of public documents and company websites. At least four members of Summit’s leadership have direct links to the Iowa governor’s office or the Iowa Utility Board (IUB), both of which could influence the future of the roughly 2,000-mile (3,200-km) pipeline, according to the review. One …