A federal judge blocked the proposed $54 billion tie-up between national insurers Anthem and Cigna, saying the combination would harm competition in the national employer market. In a 12-page order, U.S. District Judge Amy Berman Jackson said the merger would eliminate the firms' head-to-head competition for the administrative services business of large employers and result in higher prices and reduced innovation in the market. The judge's decision wasn't a surprise. Most analysts expected the deal to be blocked, especially in light of the recent court ruling blocking the merger between insurers Aetna and Humana, which had a better chance of closing at the outset. Anthem may owe Cigna a $1.85 billion breakup fee.