Both cited sources are reachable and both quotes are verbatim-accurate. The PRIMARY source (warnock.senate.gov, dated 2022-06-22, the promise date) contains the exact statement: "I've been fighting for months to pass my federal gas tax holiday bill, and pushing lawmakers and the White House alike to take aggressive action to provide relief at the pump to hardworking Georgians. Now that President Biden is on board, it's time for Congress to move urgently to pass my legislation..." It documents Warnock as the lead sponsor/champion who introduced the Gas Prices Relief Act in February 2022 and drove a months-long push, pressuring the White House. This maps to leadership of the effort, not passive support. The REPUTABLE_SECONDARY source (AJC) contains its exact quoted sentence — "it is unclear whether there are enough votes in either chamber to support a gas tax holiday" — and independently describes Warnock as the original champion of the proposal while documenting the uncertain path to passage (Pelosi/Hoyer skepticism). The promise verb is effort-based ("fight to pass"), so CHAMPIONED (led/drove the fight) does not overstate the evidence — it makes no claim that a gas-tax holiday was enacted (it was not; the bill never got a floor vote and died in the 117th Congress). The only genuine tension is CHAMPIONED vs. ATTEMPTED, a defensible rater judgment within the effort framing rather than a source, quote, or evidence failure. Applying the same adversarial bar to either party, the sources genuinely document the championing/leadership the rating rests on, so the rating stands.