The promise is a general commitment to keep taxes low so families and businesses keep more of their earnings. The rated outcome — Hyde-Smith's Yea vote on H.R. 1 (the "One Big Beautiful Bill Act"), Senate Vote #372 on July 1, 2025, which passed 50-50 with the Vice President breaking the tie and made the 2017 individual and business tax cuts permanent — is directly and independently documented by two verified PRIMARY sources. The official Senate roll call confirms the question ("On Passage of the Bill (H.R. 1, as Amended)") and her Yea vote verbatim. Her own Senate statement, quoted verbatim, frames the law around a "permanent extension of the President's 2017 tax cuts" benefiting "families, small businesses, and hardworking Americans" and avoiding "a more than $4.0 trillion tax hike on everyone." This squarely delivers on the promise. FULL rather than CHAMPIONED is correct: she was one of 50 party-line Republican votes for a bill driven by leadership and the White House, with no evidence she authored, sponsored, or led its tax provisions, so the leadership bar for CHAMPIONED is not met. The cited Washington Post source could not be directly verified (403 bot-block), but its content was independently corroborated via web search and, critically, the outcome does not depend on it — the two PRIMARY sources fully establish it.