As chair , he championed Flint 's role in the transformation of the U.S. manufacturing industry .
Walling served as the chair of the national Manufacturing Alliance of Communities from 2013 through 2015 .
As chair , chair championed Flint 's role in the transformation of the U.S. manufacturing industry .
Walling served as the chair of the national Manufacturing Alliance of Communities from 2013 through 2015 .