The new Pew poll, released Sunday, showed Obama ahead 48 percent to 45 among likely voters, a three-point bump in the president's favor after Pew’s survey one-week prior had the race tied.
The survey’s final estimate of the popular vote puts Obama at 50 and Romney at 47.
Among battleground-state voters, Obama also has a slim lead in the survey, 49-47.
The survey reflects national trends, as Obama has re-emerged with a slim lead of 0.4 percent in the Real Clear Politics polling average after Romney had pulled ahead in October.
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Romney held a 49-45 advantage in Pew’s Oct. 4-7 poll, and the candidates were tied at 47 percent in the Oct. 24-28 survey.
Other national polling also shows a tight race nationally. The NBC News/Wall Street Journal poll had Obama up 48-47 while ABC News/Washington Post and Rasmussen polls both have the race tied at 48-48 heading into the final two days of the campaign.
But a number of swing-states still remain close and the candidates are both on a cross-country weekend blitz to rally support in key battlegrounds.
Pew’s poll was conducted Oct. 31 to Nov. 3 and included 2,709 likely voters with a 2-percent margin of error.