Today's Daily Kos Research 2000 tracking poll has Obama leading McCain 52-42. All trackers are data from three days prior to posting, with the R2K numbers from today (yesterday's numbers in parentheses) and the other trackers from yesterday (previous day's data). LV=likely voter, RV=registered voter. Obama McCain MoE +/- RV/LV Today Research 2000 : 52 (52) 42 (41) 3 LV Reuters/Zogby : 49 (49) 44 (44) 2.8 LV Yesterday Battleground : 50 (51) 44 (43) 3.5 LV Rasmussen : 50 (50) 46 (45) 2 LV Diageo/