Obama above 50% in some battleground polls

New polls in three swing states indicate President Barack Obama exceeding 50% support among likely voters and holding leads of nine to 12 points over Republican nominee Mitt Romney.
Fueling those numbers, the four polls suggest that Romney has lost his edge on the economy, an issue on which the challenger has based his campaign.
The new surveys come one day after another batch of battleground state polls also suggested Obama with the advantage.
The fresh batch of polls in Ohio, Florida and Pennsylvania, which together account...