It can't be that popular, nobody talks about it like they do about rugger or footy (proper). Do you know anyone who talks about US football?lol...American Football is very popular in the UK, and its ONCE a year.
Also re topic I love the way there's almost as much coverage of US politics as their is UK politics now.
I think part of it is that the BBC's remit is now general entertainment more than public service. Even the news is a form of entertainment today.