DES MOINES — Advocates for legalized medical cannabis use in Iowa are taking their cause to the 2016 presidential race.The advocacy group Iowans 4 Medical Cannabis announced Tuesday it has developed a questionnaire that it plans to deliver to all the presidential candidates in the coming weeks.The group already has made efforts to reach out to the campaigns and the candidates themselves during their visits to Iowa.“Moms and dads across America want to know what presidential candidates are proposing to help the sick and suffering obtain medical cannabis, a proven plant that is made by God,” said Maria La France, a Des Moines mother whose 14-year-old son Quincy has epilepsy, one of the diseases that can be treated by the oil found in the marijuana plant.Iowans 4 Medical Cannabis in recent years has had limited success pressing state lawmakers to create a comprehensive medical marijuana law.The group will continue to press state lawmakers, but La France said it also will use the opportunity provided by Iowa’s prominent place in the presidential selection process to expand the message to the next president.Volunteers for the group statewide will attempt to address the candidates in person while they’re in Iowa, and the questionnaire also will be delivered to each candidate’s campaign office.“We have made a questionnaire to make it very simple for presidential candidates to tell us how they plan to help,” La France said.The questionnaire contains four questions that mostly address whether candidates think the federal government should reclassify medical cannabis as a less dangerous drug.