DES MOINES, Iowa (KCRG) – Independent presidential candidate Robert F. Kennedy Jr. canceled a planned appearance at the Iowa State Fair in Des Moines. The Des Moines Register reports he was set to speak at the Register’s Political Soapbox on Saturday afternoon. However, his campaign canceled the appearance, citing increased security concerns. No other details were provided. The cancellation comes after a gunman shot former President Donald Trump at a campaign event last month.Kennedy was one of ten candidates set to speak at this year’s Soapbox.