Morrow served as an assistant majority leader during the 2009–2010 biennium. He is a former member of the House Agriculture, Rural Economies & Veterans Affairs Committee; the House State and Local Government Operations Reform, Technology & Elections Committee; and of the Finance subcommittees for the Transportation and Transit Policy and Oversight Division; and the Transportation Finance and Policy Division. On November 16, 2010, incoming Minority Leader Paul Thissen announced that he would be one of four Minority Whips during the 2011–2012 legislative session.