 During his time as a state representative, Luetkemeyer served as chair of the Financial Services Committee and as House Republican Caucus Chairman.During his time in the state legislature, Luetkemeyer co-sponsored the statewide constitutional amendment defining marriage as being between a man and a woman, which was overwhelmingly approved by Missouri voters statewide in 2004 by a margin of 71-29.He also worked on legislation which allowed Missourians to carry concealed firearms, banned partial-birth abortions, and reformed worker compensation laws.