Abstract: Does campaign duration affect election outcomes? To date, this question has largely evaded political scientists, but it is reasonable to expect systematic links between campaign length and candidate performance in elections. We hypothesize that longer campaigns would help challengers' electoral fortunes, thereby curbing incumbency advantage and potentially boosting competitiveness in elections. Using two data sources, aggregate data from U.S. House elections between 1994 and 2006 and ANES survey data from the 2002 election cycle, we find little evidence to support contentions that campaign length affects election outcomes or candidate familiarity. The results we report suggest the political consequences, intended or not, to choices about election timing are likely minimal.