All three cited PRIMARY sources are reachable and document the promised outcome. (1) The Warren press release lists Alsobrooks among the senators introducing the Social Security Emergency Inflation Relief Act, which provides a "$200 per month emergency increase to Social Security checks" — direct evidence of advocating to protect/expand Social Security benefits. (2) The Van Hollen release title and body confirm Alsobrooks co-hosted the SSA rally "to call for protecting the integrity of Social Security, Medicare, and Medicaid," matching the advocacy component. (3) Her own press release confirms she is denouncing the administration for "slashing Social Security" and "working to slash Medicare and Medicaid," with the cited quote about her "two aging parents" appearing verbatim — direct evidence she stands against cutting benefits. For an advocacy-type promise, this consistent pattern of advocacy plus opposition to cuts supports FULL rather than PARTIAL. It is correctly NOT CHAMPIONED: she is a cosponsor (not lead author) of the flagship bills, and the rally was co-hosted with senior Senator Van Hollen (named first in the title), so no independent leadership on this specific promise. Confidence held at 0.85 because her short tenure means the "stands against raising the retirement age / cutting benefits" component rests on cosponsorships, statements, and opposition votes rather than a decisive stand-alone roll call.