To date, 12 states have approved the proposed Anthem-Cigna merger. However, few are positioned to play as big a role in reviewing the transaction as Connecticut, where Cigna has more than 4,000 employees and where Cigna and Anthem — if merged — would control roughly two-thirds of the state's health insurance business. Because Cigna's headquarters are just outside Hartford, the state's regulatory actions could significantly complicate — or facilitate — the deal. Though Connecticut has yet to act, regulators from across the country and at the federal Justice Department are looking to officials there for guidance on whether to approve or reject the merger.