General Motors' Marketing Boss Resigns

Monday, 30 Jul 2012 | 4:23 PM ET

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.