Mary Jo White took the helm of the Securities and Exchange Commission vowing to “expeditiously” finalize its mountain of postcrisis rules. Two years later, that pledge has been thwarted by bickering among its five members. The slow pace of progress has singled Ms. White out for criticism from both Republicans and Democrats, who have faulted her leadership or her approach to regulation and enforcement. The gridlock also has delayed the completion of some probes into financial misconduct. “I have more stamina than anyone I know and need all of it for this job,” Ms. White told a colleague early in her tenure, referring to her demanding schedule, according to people familiar with the conversation. More in The Wall Street Journal here.