83%

If this one doesn’t stiffen the spines of Dems who are wavering on whether to include a public health insurance option in the reform package, nothing will.

A new poll by a nonpartisan, D.C.-based research group finds truly overwhelming support for the public option. The kicker: The poll was bankrolled partly by previous opponents of health care reform, including one of the nation’s best-known insurance companies.

The poll — which was just released by the Employee Benefit Research Institute, a D.C. policy think tank — finds that a majority (53%) strongly back the availability of a public plan, while another 30% “somewhat” support it. That’s a total of 83% in favor of a public plan — a staggeringly large majority.