According to Real Clear Politics, Obama has opened up a 3.3% lead over Romney in aggregate national polling.
http://www.realclearpolitics.com/epolls/2012/president/us/general_election_romney_vs_obama-1171.html
In terms of the electoral college, if the election were held today, Obama would be reelected with 332 electoral votes to Romney's 206 electoral votes.
http://www.realclearpolitics.com/epolls/2012/president/2012_elections_electoral_college_map_no_toss_ups.html
http://www.realclearpolitics.com/epolls/2012/president/us/general_election_romney_vs_obama-1171.html
In terms of the electoral college, if the election were held today, Obama would be reelected with 332 electoral votes to Romney's 206 electoral votes.
http://www.realclearpolitics.com/epolls/2012/president/2012_elections_electoral_college_map_no_toss_ups.html