A recent Reuters/Ipsos poll conducted Oct. 23-29 found the candidates tied at 45 % . A CNN / ORC exit poll shows Republican Joni Ernst leading Iowa 's Senate race . Ernst is up 49 % to 47 % over Democrat Bruce Braley . That 's within the poll 's one percentage point margin of error .
A CNN / ORC exit poll shows Republican Joni Ernst leading Iowa 's Senate race . Ernst is up 49 % to 47 % over Democrat Bruce Braley . That 's within the poll 's one percentage point margin of error .