Timeline
Susan Collins
Republican senator from Maine; Senate Appropriations chair who crossed party lines on Iran war-powers and Cuba votes in 2026.
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#1203 Jun
Crossed party lines to support cloture on war-powers resolution
Iran Conflict 2026: Senate war-powers vote falls ten short#10420 May
Voted yes on 20 May floor advance
Iran Conflict 2026: Senate 50-47: Cassidy unlocks the floor#10319 May
Voted yes to discharge the Kaine resolution — her first Iran war-powers cross
Iran Conflict 2026: Senate 50-47 discharges Kaine Iran resolution to floor#9713 May
Voted yes on the seventh Democratic Iran war-powers resolution
Iran Conflict 2026: Senate rejects Iran war-powers vote 49-50; Murkowski crosses first time#9612 May
Mentioned in: Hegseth: Article 2 covers Iran war
Iran Conflict 2026#929 May
Mentioned in: Murkowski's Iran AUMF still unfiled before recess
Iran Conflict 2026#57 May
Mentioned in: White House signs nothing on elections
US Midterms 2026#916 May
Mentioned in: IDF kills Radwan chief Balout in Beirut
Iran Conflict 2026#883 May
Remained as third Republican co-sponsor of Murkowski Iran AUMF
Iran Conflict 2026: Young becomes fourth Republican on AUMF#8630 Apr
Voted yes again on the sixth WPR, repeating her fifth-vote position
Iran Conflict 2026: Murkowski sets four 11 May AUMF specs#8530 Apr
Mentioned in: Murkowski sets AUMF target for 11 May
Iran Conflict 2026#8530 Apr
Voted Yes on the sixth WPR, the first Republican to back a WPR challenge since 28 February
Iran Conflict 2026: Senate sixth WPR fails 47-50; Collins flips#8429 Apr
Mentioned in: WPR cliff is 1 June, not 1 May
Iran Conflict 2026#329 Apr
Voted with Democrats against sustaining Scott's point of order
Cuba Dispatch: Senate blocks Cuba war-powers check 51-47#8328 Apr
Named co-sponsor of unfiled AUMF bill
Iran Conflict 2026: Murkowski AUMF still missing on Day 60#8228 Apr
Murkowski misses her own AUMF deadline
Iran Conflict 2026#8127 Apr
Murkowski targets 28 April AUMF filing
Iran Conflict 2026#426 Apr
Voted against Kennedy SAVE Act reconciliation motion
US Midterms 2026: SAVE Act loses reconciliation route, 48-50#7925 Apr
Collins, Tillis back Murkowski's Iran AUMF draft
Iran Conflict 2026#8025 Apr
Remained on record as second Republican AUMF backer
Iran Conflict 2026: Curtis becomes third Republican on AUMF#7822 Apr
Signalled potential movement on war powers
Iran Conflict 2026: Senate rejects fifth WPR motion, 51-46#6814 Apr
Six Democrats join Senate war-powers push
Iran Conflict 2026#6913 Apr
Senate WPR reaches thirteen as deadlines cluster
Iran Conflict 2026#210 Apr
Mentioned in: SAVE Act Stalls as Thune Refuses Nuclear Option
US Midterms 2026#67 Apr
Isaacman backs Trump's 47% science cut
Artemis II Moon Mission#44 Apr