Carbon Tax Supporters Refining Details Amid Hazy Political Outlook

Groups that back a carbon tax are continuing to refine elements of their preferred policy, even though the effort faces a hazy political outlook due to skepticism from progressives concerned the policy would be an insufficient response to climate change and continued opposition to broad carbon limits from most Republicans. Even some carbon tax supporters are offering a dour political assessment. Prominent conservative economist Douglas Holtz-Eakin, a former director of the Congressional Budget Office and economic adviser to the late...