All three cited sources are reachable and each supports the FULL outcome; every quote appears verbatim. (1) The Coons press release (coons.senate.gov, PRIMARY), dated April 3, 2017 and about the Gorsuch nomination, contains the pledge verbatim: "I will vote against cloture unless the Republicans and Democrats in the Senate can somehow find an agreement that is trustworthy and reliable where on the next Supreme Court nominee they won't change the rules and we will have input..." — establishing both the promise and its conditional "unless." (2) The official Senate roll-call record (senate.gov, PRIMARY) for Vote #105, April 6, 2017, confirms the cloture motion on Gorsuch failed 55-45 under the 3/5 threshold (Cloture Rejected) and that Coons voted Nay — i.e., against cloture, exactly as pledged. (3) ABC News (REPUTABLE_SECONDARY) independently confirms "The first Senate vote to end debate on his nomination failed with a vote of 55-45." The pledge's "unless" condition (a trustworthy bipartisan agreement preserving minority input) was never met — McConnell invoked the nuclear option instead — so the pledged action (a Nay vote against cloture) came due and Coons cast it. Outcome is a precise match to the promised action and is not overstated; FULL (rather than CHAMPIONED) is appropriate because the promise's core commitment was the vote itself, which he cast as pledged. Note: the ABC News link uses the abcnews.com host rather than abcnews.go.com, but it resolves to a genuine article with the matching text, so it remains a valid supporting source.