The highly regarded election analysis site Electoral-Vote.com has a daily update of the current polling results in each state as regards the Electoral College results are on the day. They assign a state to either President Obama or Mitt Romney based on the latest polls. Since the site has been running they have been wrong as to the final result, and that very narrowly in 2004 so their methodology must have some merit.
If the site is viewed AT THIS LINK it can be seen that, based on current polling President Obama has a massive 126 Electoral College (where it counts) lead over Romney. If a mouse is hovered over each state it brings up the latest poll from the state plus the history of the final results from the previous five elections.
In the case of the battleground states for 2012 the surprising result, surprising in the face of the huge media beat up of the McCain/Palin teams result, shows that in every case Romney is polling at best even with McCain/Palin's final
McCAIN ROMNEY
FLORIDA 49% 43%
NORTH CAROLINA 49% 48%
COLORADO 45% 44%
NEVADA 43% 42%
OHIO 47% 45%
MISSOURI 49% 48%
MINNESOTA 44% 40%
INDIANA 49% 48%
PENNSYLVANIA 44% 44%
NEW HAMPSHIRE 45% 45%
Romney is doing better than McCain/Palin in Wisconsin and Michigan but it is unlikely that will mean anything in November as President Obama is likely to win them again.