ON THE TRAIL: Republican presidential candidates Sen. John McCain, R-Ariz., above left, and former

ON THE TRAIL: Republican presidential candidates Sen. John McCain, R-Ariz., above left, and former Massachusetts Gov. Mitt Romney, right, campaign before the upcoming South Carolina primary. McCain meets residents at a town-hall event in Sumter, and Romney holds an Easy Button given to him at a Staples store in Columbia. They were campaigning Thursday.