Los Angeles isn’t the city of angels: it’s the city of rats. Last year, LA shot up in the rankings of the “rattiest cities” from third to second place, and it’s closing in fast on Chicago. What is its secret? There is the fetid filth of the junkie vagrant camps where typhus, a medieval disease spread by rats, made a comeback almost as fast as crime once city officials legalized the ‘homeless’ trifecta of street living, drug use and shoplifting. And like criminals and junkies, the rats have Democrats on their side. In the fall of last year, Gov. Newsom...