Perhaps it was fitting that in the moments that Virginia Gov. Ralph Northam first came under fire late last week for a yearbook photograph portraying two men in racially insensitive manners–one in blackface, the other donning Ku Klux Klan robes–former Housing and Urban Development (HUD) Secretary Julian Castro was the first 2020 Democrat hopeful to call on Northam to resign. Castro was out with a statement before any of his 2020 rivals—declared or considering—and was perhaps the boldest, directly calling on Northam to resign immediately. “It doesn’t matter if he is a Republican or a Democrat,” Castro tweeted. “This behavior...