Subtle

It's almost a necessity for any presidential candidate who swings through Philadelphia - making a stop at one of the city's famous cheesesteak shops.

But the landmark Philly restaurant former New York City Mayor Rudy Giuliani plans to stop at later Monday is also famous for another reason: its controversial 'Please speak English' sign.

Joe Vento, the owner of Geno's Steaks, sparked controversy last year when he put up a sign at his store proclaiming, "This is America. When Ordering Please Speak English."