Three years after taking over for Larry King, Mr. Morgan has seen the ratings for “Piers Morgan Live” hit some new lows, drawing a fraction of viewers compared with competitors at Fox News and MSNBC.

It’s been an unhappy collision between a British television personality who refuses to assimilate — the only football he cares about is round and his lectures on guns were rife with contempt — and a CNN audience that is intrinsically provincial. After all, the people who tune into a cable news network are, by their nature, deeply interested in America.