CVS is plotting a $66 billion takeover — and it has a lot to do with fending off Amazon (AET, CVS, A

CVS Health's potential deal to buy Aetna has a lot to do with Amazon, and it illustrates just how serious a threat the tech giant is to traditional healthcare companies. The move would give CVS control over more of the chain between a drugmaker and a patient, possibly bolstering profits.  But it remains to be seen if a deal like this can protect healthcare companies from being "Amazon'd."   Amazon's notorious for stepping into new businesses and crushing the competition with low...