Good , old-fashioned door-knocking -- Door - knocking is still playing a role in the campaign for Iowa 's open Senate seat . Canvassers are using algorithms to target voters likely to vote for their candidates . To collect voter data , Democratic canvassers use clipboards while Republicans have access to a phone app . No more absentee ballots have been cast so far this year than at this time in 2010 .
Door - knocking is still playing a role in the campaign for Iowa 's open Senate seat . Canvassers are using algorithms to target voters likely to vote for their candidates . To collect voter data , Democratic canvassers use clipboards while Republicans have access to a phone app . No more absentee ballots have been cast so far this year than at this time in 2010 .