Policy Integrity signed on to comments filed with the Colorado Public Utilities Commission (PUC) by Western Resource Advocates and the Western Grid Group. These comments sum up the key arguments presented in the long-running docket in which the PUC has considered questions about participation in a competitive wholesale market. The comments organize the points made in support of Colorado opting to join a new western Regional Transmission Organization (likely an expanded version of California's ISO+EIM) instead of joining SPP to the east or establishing its own Colorado-only RTO.