>> reporter: the president and first lady also called in to the annual macy's day parade. >> happy thanksgiving, everyone. video meage, whing thetid a one thing mr. bideca thankful for today, a note from his doctor saying a 3-millimeter polyp removed from his colon last week turns out to be benign, though the doctor noted it was potentially precancerous. the polyp was discovered during a routine colonoscopy at walter reed military medical center last week. >> i feel great. >> reporter: doctors say such polyps are common, especially in 79-year-olds. the president's doctor is recommending he get a gallup colonoscopy in seven to ten years -- follow-up colonoscopy. >> o'donnell: the holiday shopping seans is underway with retailers expecting to ring up $850 billion in sales this year, cbs's jonathan vigliotti has