People who believe voting is important have high political ----c-c-. What's the missing word? Thanks.

efficacy

http://en.wikipedia.org/wiki/Political_efficacy

The missing word is "efficacy." People who believe that voting is important have high political efficacy.

Political efficacy refers to an individual's belief in their own ability to understand and influence political events. It is the sense that one's vote and political participation can make a difference in shaping the outcome of an election or influencing public policy.

To arrive at this answer, I used my knowledge base to explain the concept of political efficacy and its relation to the importance of voting. Understanding the meaning of the word "efficacy" and its relevance in the political context is crucial for determining the missing word in the original question.