False. They supported letting Bush decide based on the threat posed by Iraq. That was what the voted on. They couldn't know he would lie us into the war over stockpiles of WMD's that weren't actually there.
Text for H.J.Res.114 - 107th Congress (2001-2002): Authorization for Use of Military Force Against Iraq Resolution of 2002
www.congress.gov
Authorization.--The President is authorized to use the Armed
Forces of the United States as he determines to be necessary and
appropriate in order to--
(1) defend the national security of the United States against the continuing threat posed by Iraq; and
(2) enforce all relevant United Nations Security Council resolutions regarding Iraq.