The ad is a virtual portrait in sepia. It starts with photos from the candidate’s youth and highlights her working class roots and commitment to regular folk. It then contrasts her hometown values — honesty, responsibility — with the immoral values of self-interested Wall Street bankers. The candidate says she stood up to Wall Street and held big banks accountable. The new Elizabeth Warren ad? No, a Martha Coakley ad from her failed 2010 Senate campaign against Republican Scott Brown. Just photo-shop in a picture of Warren, and you will practically duplicate the ad that Warren released last week in...