Polls: Obama Ahead in 3 Key States

President Barack Obama holds narrow leads over Mitt Romney in the battleground states of Wisconsin, New Hampshire and Iowa as the candidates enter the campaign's final days, new polling shows.

In Wisconsin and New Hampshire, Mr. Romney remains well within striking distance, despite signs that opinions are hardening and the pool of undecided voters remains small, according to new Wall Street Journal/NBC News/Marist Poll surveys.

Mr. Obama holds a 49%-46% lead in Wisconsin among likely voters, half what it was two weeks ago, and a 49%-4