CHICAGO--Rick Santorum was sunbathing in Puerto Rico--on a lounge chair by a pool, taking a break from campaigning--when someone spotted him and took a photo--with the picture of the shirtless presidential candidate landing on-line.

Santorum said he probably should lose 15 or 20 pounds in a Friday interview on Chicago radio station WIND.

Santorum tells WIND, "I apologize to all of us, because I'm sure it's not a pretty sight."

In contrast, Mitt Romney is trim and slim--he wears his 501 Levis well--fitting in pants with a 34 waist and a 34 leg. My report on Mitt and his Levis is HERE.