Rep. Elijah Cummings’s funeral Friday, marked by speeches from Barack Obama, the Clintons, and Cummings’s family, was as much a heartfelt celebration of a man who dedicated his life to public service as it was an indictment of President Donald Trump’s character in office. In his last months, Cummings, who chaired the powerful House Committee on Oversight and Reform — one of the committees carrying out the impeachment inquiry into Trump —became the subject of Trump’s ire. Trump called Cummings a “brutal bully” in July and derided the Congress member’s Baltimore district as the “worst in the USA,” a “rat...