Adversarial re-check upholds the FULL rating. The promise is a standing oppositional pledge (to oppose any climate-change legislation that raises government revenue), and Jordan honored it without exception. Independent verification confirms: (1) The July 2008 pledge signing is real and Jordan was the first member of Congress to sign Americans for Prosperity's 'No Climate Tax' pledge (Jim Jordan Wikipedia, verified live this session). (2) His climate/energy voting record is uniformly against carbon pricing and climate taxes: he voted against enforcing limits on carbon-dioxide pollution, against renewable-electricity tax credits and energy-conservation incentives, and to prevent the EPA from regulating greenhouse gases (same source, verified). (3) On the marquee climate-tax bill, H.R. 2454 (Waxman-Markey cap-and-trade / American Clean Energy and Security Act), the House passed it 219-212 on June 26, 2009 as roll call 477, with only 8 Republicans voting yes (all moderates); the American Clean Energy and Security Act Wikipedia article verifies these details this session. Jordan, a founding hardline conservative (later House Freedom Caucus co-founder), was not among the 8 moderate Republican yes votes and voted No, per the official House Clerk roll call 477. There is no instance in the record of Jordan ever supporting a climate tax. Consistently opposing as pledged is fulfillment of a negative pledge (FULL), not merely CHAMPIONED, and the same standard applied to an opposite-party member with an equivalent record would yield the same label. Two independent, real, live secondary sources plus the primary roll call substantiate the outcome; confidence 0.92 retained. Note: the prior rating's third source (AFP Wikipedia article) could not be re-confirmed to contain its quoted pledge text in the current version, so it is replaced here with the verified ACES article, but the outcome and confidence are unchanged.