CookPVI

Given a predicate that represents a relationship or action between entities, generate a one-sentence description explaining its meaning.  
# Instructions
Focus on describing the relationship, not the entities themselves. 
# Response Format
Begin the description with \' Indicates...\'

Predicate: CookPVI

Indicates the partisan voting index of a political district as measured by the Cook Political Report, showing how strongly it leans toward one major party compared to the national average.