This CIA online article tells us a little about the Gini index:
Distribution of family income - Gini index measures the degree of inequality in the distribution of family income in a country. The more nearly equal a country's income distribution, the lower its Gini index,
The table indicates a fairly modest place for United States (41), but the data is old (2007).
I am wondering if any US political program has included improvement of this index or it is too vague/abstract to include such a thing within a campaign.
Question: Was there any US political campaign that included Gini index improvement?