President Donald Trump’s pick to lead the Securities and Exchange Commission has earned $7.62 million since 2015 representing some of Wall Street’s biggest firms, including Goldman Sachs Group Inc. and Bill Ackman’s Pershing Square Capital Management, according to a federal disclosure form. Jay Clayton, the Sullivan & Cromwell partner tapped by Trump, outlined his clients — and his potential conflicts — in a filing to the U.S. Office of Government Ethics that he signed in January.