Previous survey analyses examining campaign effects on turnout are somewhat unconvincing because they do not control for the fact that individuals may have decided they will vote independent of campaign activities (even before the campaign begins). Using a unique repeated measures data set of the 2000 presidential campaign, I estimate a Markov chain transition model to test the effects of campaign efforts on turnout intention conditional on precampaign turnout intention. I demonstrate that campaign efforts have a substantial influence on turnout intention, even taking initial turnout intention into account. More notably, I find that different campaign efforts are effective for intended nonvoters than for intended voters.