President Barack Obama has the edge over Republican Mitt Romney in three potentially decisive states in the presidential election. Obama tops Romney by seven percentage points among likely voters in both Ohio (49-42 percent) and Virginia (50-43 percent). In Florida, the president holds a five-point edge (49-44 percent). Obama’s lead is just outside the poll’s margin of sampling error in Ohio and Virginia, and within the margin of sampling error in Florida. The good news for Romney is that among voters who are “extremely” interested in this year’s election, the races are much tighter. Obama is up by just two...