NBC/WSJ/Marist poll: Romney gains in key swing states

A week after President Barack Obama’s lackluster debate performance, Republican challenger Mitt Romney has made some gains in three key swing states among those most likely to vote, according to the latest round of NBC News/Wall Street Journal/Marist polls.

Romney and Obama remain in a virtual tie in Virginia and Florida, and the Democratic incumbent maintains a slight advantage in Ohio. [cont.]

Domenico Montanaro, NBC News