Opponents of a regional effort to limit transport pollution, led by Massachusetts, gained momentum on Friday in their fight

The Boston press conference was organized by members of right-leaning groups in all six New England countries to renew their criticism of the CCI, hoping political leaders across the area will embrace their claim that the rise in fuel prices created by the initiative would pose an undue burden on citizens and companies.

Speaker of the Massachusetts Fiscal Alliance, Paul Craney, said it is "a day by day," after several gover....