The RWGTM moves electricity-sector natural gas costs to the ReEDS version, although the ReEDS version yields electricity-sector natural gas demand to the RWGTM. The 2 models successfully present to a remedy under benchmark situation conditions. We provide electricity-sector and natural gas industry evolution utilizing the integrated versions for this reference situation. This paper shows the integrated versions produced similar national-level effects as when operating at a stand-alone form, but that regional and state-level outcomes may fluctuate considerably. As we emphasize, these regional differences have potentially major consequences for electric industry planners particularly in the aftermath of significant policy changes for the industry (e.g., the Clean Power Plan).