During her tenure as speaker of the House, Democratic Leader Nancy Pelosi invited investment banker William Hambrecht to participate in multiple economic meetings with her party’s leadership without revealing her extensive personal and financial relationship with him. The links between Hambrecht and Pelosi are a matter of public record. Hambrecht was Pelosi’s son’s boss between July 2009 and September 2011. Pelosi’s husband, Paul, has holdings in a half-dozen companies linked to Hambrecht. The Pelosis purchased a team in Hambrecht’s nascent United Football League for $12 million in 2009, just days before the then-speaker invited Hambrecht to participate in an economic...