First , there was an television ad featuring a most unusual wheel : a smug-looking head of Jon Corzine surrounding by spokes leading to a gallery of characters with whom the senator is supposedly connected in some way , including former Gov . James E. McGreevey ; former Senator Robert Torricelli ; George E. Norcross III ; the businessman Carl Icahn , and , oddly , Kenneth Lay , the former chief executive of Enron , which did business with Goldman Sachs , the Wall Street firm that Mr. Corzine used to lead .