The November special election in Iowa Senate district 18 confirmed that Democrats will maintain a 26 to 24 majority in the upper chamber during the legislature’s 2012 session, set to begin on January 9.

Senate Democrats and Republicans recently announced updated committee assignments. Majority and minority leadership teams are after the jump, along with all members of standing committees. I’ve also noted which senators are up for re-election in 2012 and which are retiring next year.