William Cohan, author of "Money and Power: How Goldman Sachs Came to Rule the World" and a Bloomberg Television contributing editor, discusses his latest Bloomberg View column about President Barack Obama’s administration policy on Wall Street.   Cohan speaks with Erik Schatzker and Deirdre Bolton on Bloomberg Television's "InsideTrack." (William D. Cohan is a Bloomberg View columnist. The opinions expressed are his own. Source: Bloomberg)