Who participated in Iowa's 2016 caucuses?
In 2016, 186,874 Iowans participated in the Republican caucus and 171,109 participated in the Democratic caucus, both held on Feb. 1. On that date, according to the Iowa secretary of state’s office, there were 586,835 active registered Democratic voters and 615,763 active Republican registered voters. That works out to 30.3% of eligible Republicans and 29.2% of eligible Democrats participating in the caucuses, or 18.5% of the state’s total 1,937,317 active registered voters. (By comparison, in 2016, turnout averaged 29.3% across all the Democratic and Republican primaries.)
Who participated in Iowa's 2016 caucuses?  | Among Iowa S active voters, as ofFeb. 1, 2016  | 29. 2% of  | all registered  | Democrats  | All registered  | Democrats  | 30.3%  | Not registered with  | 18. 5% of all registered  | the Democratic or  | voters participated  | Republican parties  | in the 2016 caucuses  | 37. 9%  | All registered  | Republicans  | 31.8%  | 30. 3% of  | all registered  | Republicans  | Source: Iowa secretary of state.  | PEW RESEARCH CENTER 