 He has also been on the Maryland Rural Caucus and the Maryland Legislative Sportsmen's Caucus since 2003.His efforts were recognized when he was selected as Deputy Minority Whip (2003–06).Jennings was elected to the Maryland Senate in 2010, and served on the Education, Health and Environmental Affairs Committee (environment and health occupations subcommittees, 2011–15), Joint Advisory Committee on Legislative Data Systems (2011–14), and Joint Committee on Transparency and Open Government (2011–14).