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It also appears that President Obama's attacks on Romney's Medicare proposal have not yet resonated among Florida seniors; among voters over 50, the Republican holds a 54-42 percent lead.

In New Hampshire, Romney holds a similar 48-45 percent lead among independent voters, and only trails the president by a single percentage point with women. Again, Romney posted a double-digit advantage over Obama with men and those over 50 years old.

The surveys were conducted through Thursday night, and do not account for any movement that may have occurred after Thursday night's vice presidential showdown between Joe BidenJoseph (Joe) Robinette BidenProgressive rise is good news for Sanders, Warren Biden says 'enough is enough' after Santa Fe school shooting Zinke provided restricted site tours to friends: report MORE and Paul RyanPaul Davis RyanConservatives leery of FBI deal on informant Overnight Health Care — Sponsored by PCMA — House passes 'right to try' drug bill | Trump moves to restrict abortion referrals Hillicon Valley: Trump claims 'no deal' to help Chinese company ZTE | Congress briefed on election cyber threats | Mueller mystery - Where's indictment for DNC hack? | Zuckerberg faces tough questions in Europe MORE.