The Federal Department of Justice filed suit to block the Cigna-Anthem merger. 

The Federal Department of Justice filed suit to block the Cigna-Anthem merger. 

The Federal Department of Justice filed suit to block the Cigna-Anthem merger.  In May 2018, Cigna announced its intention to merge with Express Scripts. Address the following in your assessment:
How are these two actions similar?
How are these different?
How does this differ from the proposed Walmart-Humana merger?