Warren is at 51 percent favorability, with 36 percent seeing her unfavorably. Brown has 45 percent favorability, with 42 percent viewing him unfavorably. He leads 54 percent to 43 percent among independents, while in September he had led 55 percent to 34 percent. And the poll has President Obama trouncing Mitt Romney in the White House race, with 63 percent to the former Massachusetts governor's 31 percent. Brown and Warren were supposed to face off in their fourth and final debate tonight, but it was called off due to Hurricane Sandy. It's unclear whether the two will reschedule the debate in the remaining week prior to the election. The survey of 600 likely voters was conducted October 25-28. It has a margin of error of plus-or-minus 4 percent.