Republicans continue to be on pace to exceed their early voting performance from 2008, though Democrats still lead in most of the important states.
Obama continues to hold a slight lead in Ohio and Pennsylvania, while Florida and Virginia are tied.
The poll is the first swing state poll since last week's debate to show Romney gaining by a statistically significant margin.
Romney ticks up a few points in Ohio and Virginia and remains in a tight race in Florida, according to new NBC News/Marist College polls.
The latest poll shows Obama's swing state mo' catching on in Florida.
The poll is the latest to show the senator building a double-digit lead.
A multitude of polls in key states -- both at the presidential level and the Senate level -- show Democrats' fortunes improving.
The new Marist College/NBC News/Wall Street Journal polls show the president's bump in the polls has registered in swing states.
Chris Cillizza will chat with Rep. Connie Mack (Fla.), the Republican challenging Sen. Bill Nelson (D), live on Google's set in the Tampa Convention Center.