Michael E. Gronstal (born January 29, 1950) is the Iowa State Senator representing the 50th District in the Iowa Senate. He has served since 1985 and is currently the majority leader and chairman of the Rules and Administration committee. He is also chairman of the DLCC, the national organization to elect Democratic state legislators.Gronstal has supported efforts to increase renewable fuels in Iowa and in 2006, Iowa passed the nation’s strongest ethanol legislation in 2006.