According to a pollster that combines online surveys with traditional methods, President Barack Obama leads Mitt Romney 52 percent to 44. Sen. Bob Casey leads Tom Smith 50 percent to 42.
Romney leads independents 54 percent to 41.
YouGov surveyed 1,273 likely voters from Oct. 21 to Nov. 3. The margin of error is plus or minus 3.3 percent.
Obama’s lead is wider than it was in YouGov’s mid-October poll when he lead 51 percent to 44. Casey’s lead was narrower then, too, 48 percent to 41.
The methodology explanation from YouGov:
Sampling method: Respondents were selected using sample matching. A random sample (stratified by age, gender, race, education, and region) was selected from the 2010 American Community Survey. Voter registration, turnout, religion, news interest, minor party identification, and non-placement on an ideology scale, were imputed from the Registration and Voting Supplements of the 2008 and 2010 Current Population Surveys and the Pew Religion in American Life Survey. Matching respondents were selected from the YouGov panel, an opt-in Internet panel.
Some respondents were initially selected on September 7-14 from YouGov¹s panel, then recontacted on October 4-11 and again on October 31-November 3. Others were selected for the first time on October 31-November 3.
Weighting: The sample was weighted using propensity scores based on age, gender, race, education, news interest, and non-placement on an ideology scale.