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AP file photo

Cigna is suing Anthem to halt its merger, and it's demanding Anthem pay the $1.85 billion termination fee as well as $13 billion in damages that include "the amount of premium that Cigna shareholders did not realize as a result of the failed merger process."

A federal judge ruled last week that the Anthem-Cigna transaction was anticompetitive, particularly for people who get their health insurance through big national employers, and Anthem had intended to file an appeal. Now, Anthem will have to fight its own merger partner in court. Anthem said Cigna does "not have a right" to kill the deal.

This break-up is a lot less amicable than the deal between Aetna and Humana. Those two insurers mutually terminated their merger earlier today.

Why this matters: Anthem and Cigna have disliked each other from the start, when Cigna CEO David Cordani demanded he become the top executive of the combined company but got no such assurances. The legal teams on both sides also had multiple quibbles. It's only going to get messier and add more legal costs to the growing tab associated with the health insurance mega-mergers. And it's all coming at a time when Congress is trying to dismantle Obamacare, which would disrupt both companies.

Go deeper

1 hour ago - Health

WHO: Not yet known whether Omicron leads to more severe disease

Photo illustration: Pavlo Gonchar/SOPA Images/LightRocket via Getty Images

The World Health Organization on Sunday said that it is not yet clear whether the newly discovered Omicron variant is more transmissible than other strains of the COVID-19 virus.

Why it matters: The agency's statement comes as the variant, discovered in South Africa, has already been detected in European and Asian countries.

7 hours ago - Health

Fauci: Omicron variant will "inevitably" be found in U.S.

Photo: Chip Somodevilla/Getty Images

Anthony Fauci, the director of the National Institute of Allergy and Infectious Diseases, cautioned on Sunday that the COVID-19 Omicron variant will "inevitably" be found in the United States.

Driving the news: Fauci, Biden's chief medical adviser, told ABC's George Stephanopoulos on "This Week" that U.S. officials will meet with colleagues from South Africa later on Sunday to try to determine the severity of the cases, as countries scramble to learn more about the variant.

Updated 9 hours ago - Politics & Policy

Dems fear supply-chain blame

Illustration: Aïda Amer/Axios

As supply-chain kinks drive up prices and disrupt holiday shopping, Democrats are scrambling to show action and deflect blame.

Why it matters: With their party controlling both the White House and Capitol, vulnerable Democrats worry supply-chain snafus will hurt them in next year's midterms.