Blue Cross Blue Shield of Delaware is affiliating with Highmark Inc., Pennsylvania’s largest health insurer, in a deal announced less than a week after its interest in finding a strategic partner was made public.

Highmark Inc., the largest health insurer in Pennsylvania, is looking toward its workers to reduce its own health care costs and better engage them in its own health care decisions.

A group representing the nation’s health insurance companies is calling an investigation by the U.S. House into the finances of 52 insurers a “politically motivated, taxpayer financed fishing expedition.”

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