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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 BidenOvernight Tech: FCC won't delay net neutrality vote | Google pulls YouTube from Amazon devices | Biden scolds social media firms over transparency Medicaid funds shouldn't be used to subsidize state taxes on health care Biden hits social media firms over lack of transparency MORE and Paul RyanPaul Davis RyanMcConnell names Senate GOP tax conferees House Republican: 'I worry about both sides' of the aisle on DACA Overnight Health Care: 3.6M signed up for ObamaCare in first month | Ryan pledges 'entitlement reform' next year | Dems push for more money to fight opioids MORE.