WHYY By Rachel McDevittMay 11, 2021 Shown is the Pennsylvania Capitol in Harrisburg, Pa., Monday, March 22, 2021. (AP Photo/Matt Rourke) This article originally appeared on StateImpact Pennsylvania. — State lawmakers are asking the administrators of a regional cap-and-trade program to bar Pennsylvania’s entrance unless the legislature approves. But the nonprofit RGGI, Inc. doesn’t require legislative backing to admit a new state. All Republicans and one coal-region Democrat on the House Environmental Resources and Energy Committee voted recently to warn RGGI, Inc. against Gov. Tom Wolf’s “illegitimate” attempt to join the Regional Greenhouse Gas Initiative. They voted the same day the Department of Environmental Protection released its final draft rule to participate.