Independently verified both cited primary sources by fetching the House Clerk XML directly (both returned HTTP 200, live and real). This is a compound two-part promise. HALF A (support a federal Balanced Budget Amendment) was KEPT: on 12-Apr-2018, roll call 138, H.J.Res.2 'Proposing a balanced budget amendment to the Constitution of the United States' (Motion to Suspend the Rules and Pass, which Failed to reach two-thirds), legislator W000816 Williams (party=R, state=TX) voted Yea. HALF B (oppose efforts to raise the debt ceiling) was VIOLATED: on 31-May-2023, roll call 243, H.R. 3746 'Fiscal Responsibility Act' (On Passage, Passed), Williams (TX) [W000816, party=R, state=TX] voted Aye; that Act suspended/raised the federal debt limit through 1-Jan-2025, the opposite of the promise. Name-id W000816 is unambiguously Roger Williams of Texas, correctly distinguished in the 2023 XML from Williams (GA) [W000788] and Williams (NY) [W000828]. Because he genuinely kept one half (a verifiable supporting BBA vote) but affirmatively broke the other (voted to raise the debt ceiling), PARTIAL ('kept some but not all') is the fair, party-neutral label; a lower outcome would under-credit the real kept BBA vote and a higher one would ignore the active debt-ceiling violation. Same standard would apply to any party. Confidence held at 0.7 given the inherent judgment in aggregating two opposite halves.