A united Tufts-Harvard Pilgrim is better for consumers, CEOs say

In the latest move in the ever-consolidating health care industry, two of Massachusetts’ largest insurers have begun making the pitch for why they, too, should merge. The chief executives of Harvard Pilgrim Health Care and Tufts Health Plan told the Globe they must combine in order to provide more-affordable coverage to more people across New England, and to better compete against giant national insurers.