General Motors' Marketing Boss Resigns

4:23 PM ET Mon, 30 July 2012

Debates are going on about whether Joel Ewanick is directly responsible for General Motors not growing sales in the last year, or whether there is a larger issue at the company, with CNBC's Phil LeBeau; and Diana Furchtgott-Roth, Manhattan Institute, and CNBC contributor Jared Bernstein, weigh in.