Donald Trump has exposed a weak link in American democracy. It is dependent, as the Founders would put it, on its leaders having a modicum of good character. Benjamin Franklin warned that without strict character requirements, government roles would attract “the bold and the violent,” rather than the wise and peaceful. Trump’s new financial disclosure forms, released Tuesday, provide only the latest confirmation that the President and his family has gotten richer while he has served as president, stemming from a set of actions that have been brazen, if not illegal. This Trump family buckraking, as revealed in the new...