In a magnificent piece of investigative reporting, the Associated Press has discovered that the viral phrase “Let’s Go Brandon” is actually “code” for a far more vulgar insult of our beloved president Joe Biden.The AP “wire service” — a misnomer in a wireless age — took great pains to explain where “Let’s Go Brandon” originated and the shocking truth about the people shouting it: They don’t like Joe Biden very much.

But how did Republicans settle on the Brandon phrase as a G‑rated substitute for its more vulgar three-word cousin?
It started at an Oct. 2 NASCAR race at the Talladega Superspeedway in Alabama. Brandon Brown, a 28-year-old driver, had won his first Xfinity Series and was being interviewed by an NBC Sports reporter. …