Sen. Lamar Alexander (R-Tenn.) is taking aim at a proposal to extend a key renewable energy tax credit as part of a broader payroll tax cut package.

“I cannot think of anything that would derail more rapidly the consensus that is developing about extending the payroll tax cut than to do such a thing,” Alexander said during a speech on the Senate floor Wednesday.

Alexander was responding to reports that House and Senate negotiators could extend the production tax credit for wind power as part of a package to extend the payroll tax cut.

But Senate Democratic aides said that extension of expiring renewable electricity tax credits are unlikely to make it into the final payroll deal.